www.nhs.uk Website Information
Daily Unique Visits: 3,214,908
Daily Page Views: 25,719,264
Income Per Day: $25,719
Estimated Value: $27,776,520
This website is located in United States and is using following IP address 4.158.93.42. See the complete list of popular websites hosted in United States.
www.nhs.uk is registered under .UK top-level domain. Please check other sites in .UK zone.
Website www.nhs.uk is using the following name servers:
- ns1.nhs.uk
- ns2.nhs.uk
- ns3.nhs.uk
- ns4.nhs.uk
and is probably hosted by MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US. See the full list of other websites hosted by MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US.
The highest website www.nhs.uk position in Alexa rank database was 438 and the lowest rank position was 13579. Current position of www.nhs.uk in Alexa rank database is 474.
Desktop speed score of www.nhs.uk (46/100) is better than the results of 19.93% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of www.nhs.uk (97/100) is better than the results of 49.9% of other sites and means that the page is mobile-friendly.
Mobile speed score of www.nhs.uk (33/100) is better than the results of 12.14% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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www.nhs.uk Alexa Rank
The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.
www.nhs.uk whois
WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.
Error for "www.nhs.uk".
the WHOIS query quota for 167.99.102.248 has been exceeded
and will be replenished in 284 seconds
WHOIS lookup made at 01:25:46 03-Aug-2022
--
This WHOIS information is provided for free by Nominet UK the central registry
for .uk domain names. This information and the .uk WHOIS are:
Copyright Nominet UK 1996 - 2022.
You may not access the .uk WHOIS or use any data from it except as permitted
by the terms of use available in full at https://www.nominet.uk/whoisterms,
which includes restrictions on: (A) use of the data for advertising, or its
repackaging, recompilation, redistribution or reuse (B) obscuring, removing
or hiding any or all of this notice and (C) exceeding query rate or volume
limits. The data is provided on an 'as-is' basis and may lag behind the
register. Access may be withdrawn or restricted at any time.
the WHOIS query quota for 167.99.102.248 has been exceeded
and will be replenished in 284 seconds
WHOIS lookup made at 01:25:46 03-Aug-2022
--
This WHOIS information is provided for free by Nominet UK the central registry
for .uk domain names. This information and the .uk WHOIS are:
Copyright Nominet UK 1996 - 2022.
You may not access the .uk WHOIS or use any data from it except as permitted
by the terms of use available in full at https://www.nominet.uk/whoisterms,
which includes restrictions on: (A) use of the data for advertising, or its
repackaging, recompilation, redistribution or reuse (B) obscuring, removing
or hiding any or all of this notice and (C) exceeding query rate or volume
limits. The data is provided on an 'as-is' basis and may lag behind the
register. Access may be withdrawn or restricted at any time.
www.nhs.uk server information
Servers Location
www.nhs.uk desktop page speed rank
Last tested: 2016-06-12
Desktop Speed
Bad
46/100
www.nhs.uk Desktop Speed Test Quick Summary
priority - 80Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 778.9KiB (75% reduction).
Compressing http://www.nhs.uk/includes/choices.js could save 117.8KiB (79% reduction).
Compressing http://www.nhs.uk/css/screen.css could save 108.4KiB (82% reduction).
Compressing http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js could save 76.8KiB (72% reduction).
Compressing http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 could save 73.4KiB (75% reduction).
Compressing http://www.nhs.uk/css/homepage.css could save 64.1KiB (87% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.11.3.min.js could save 61.2KiB (65% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.7.1.min.js could save 59.3KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 52.5KiB (80% reduction).
Compressing http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D could save 50.4KiB (76% reduction).
Compressing http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js could save 27.7KiB (70% reduction).
Compressing http://www.nhs.uk/css/print.css could save 19KiB (77% reduction).
Compressing http://www.nhs.uk/includes/webtrends.min.js could save 15.2KiB (64% reduction).
Compressing http://www.nhs.uk/css/refresh.css could save 15.1KiB (78% reduction).
Compressing http://www.nhs.uk/css/homepage-refresh.css could save 11.8KiB (63% reduction).
Compressing http://www.nhs.uk/includes/swfobject.js could save 5.2KiB (69% reduction).
Compressing http://s.webtrends.com/js/webtrends.hm.js could save 5.2KiB (71% reduction).
Compressing http://www.nhs.uk/includes/translate.js could save 4.3KiB (74% reduction).
Compressing http://www.nhs.uk/includes/jquery.cookie.js could save 2.7KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D could save 2.6KiB (66% reduction).
Compressing http://www.nhs.uk/includes/nhs.typeahead.js could save 2.3KiB (69% reduction).
Compressing http://www.nhs.uk/includes/AC_RunActiveContent.js could save 2.2KiB (68% reduction).
Compressing http://www.nhs.uk/css/report-comments.css could save 1.3KiB (71% reduction).
Compressing http://www.nhs.uk/includes/jquery.bgiframe.min.js could save 648B (47% reduction).
Compressing http://www.nhs.uk/css/screen.css could save 108.4KiB (82% reduction).
Compressing http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js could save 76.8KiB (72% reduction).
Compressing http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 could save 73.4KiB (75% reduction).
Compressing http://www.nhs.uk/css/homepage.css could save 64.1KiB (87% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.11.3.min.js could save 61.2KiB (65% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.7.1.min.js could save 59.3KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 52.5KiB (80% reduction).
Compressing http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D could save 50.4KiB (76% reduction).
Compressing http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js could save 27.7KiB (70% reduction).
Compressing http://www.nhs.uk/css/print.css could save 19KiB (77% reduction).
Compressing http://www.nhs.uk/includes/webtrends.min.js could save 15.2KiB (64% reduction).
Compressing http://www.nhs.uk/css/refresh.css could save 15.1KiB (78% reduction).
Compressing http://www.nhs.uk/css/homepage-refresh.css could save 11.8KiB (63% reduction).
Compressing http://www.nhs.uk/includes/swfobject.js could save 5.2KiB (69% reduction).
Compressing http://s.webtrends.com/js/webtrends.hm.js could save 5.2KiB (71% reduction).
Compressing http://www.nhs.uk/includes/translate.js could save 4.3KiB (74% reduction).
Compressing http://www.nhs.uk/includes/jquery.cookie.js could save 2.7KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D could save 2.6KiB (66% reduction).
Compressing http://www.nhs.uk/includes/nhs.typeahead.js could save 2.3KiB (69% reduction).
Compressing http://www.nhs.uk/includes/AC_RunActiveContent.js could save 2.2KiB (68% reduction).
Compressing http://www.nhs.uk/css/report-comments.css could save 1.3KiB (71% reduction).
Compressing http://www.nhs.uk/includes/jquery.bgiframe.min.js could save 648B (47% reduction).
priority - 18Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
http://s.webtrends.com/js/webtrends.hm.js (expiration not specified)
http://www.nhs.uk/css/print.css (expiration not specified)
http://www.nhs.uk/css/refresh.css (expiration not specified)
http://www.nhs.uk/css/report-comments.css (expiration not specified)
http://www.nhs.uk/css/reset.css (expiration not specified)
http://www.nhs.uk/img/gov-uk.gif (expiration not specified)
http://www.nhs.uk/img/header/choices-logo.gif (expiration not specified)
http://www.nhs.uk/img/information-standards.gif (expiration not specified)
http://www.nhs.uk/img/login.png (expiration not specified)
http://www.nhs.uk/img/notifications/icon-close-das.gif (expiration not specified)
http://www.nhs.uk/img/search-magnifying-glass.png (expiration not specified)
http://www.nhs.uk/includes/AC_RunActiveContent.js (expiration not specified)
http://www.nhs.uk/includes/choices.js (expiration not specified)
http://www.nhs.uk/includes/jquery-1.11.3.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery-1.7.1.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery.bgiframe.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery.cookie.js (expiration not specified)
http://www.nhs.uk/includes/nhs.typeahead.js (expiration not specified)
http://www.nhs.uk/includes/translate.js (expiration not specified)
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.load.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.min.js (expiration not specified)
https://translate.googleapis.com/translate_static/css/translateelement.css (60 minutes)
https://translate.googleapis.com/translate_static/…ent/34/element_main.js (60 minutes)
https://translate.googleapis.com/translate_static/js/element/main.js (60 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
http://www.nhs.uk/includes/swfobject.js (11.5 hours)
http://www.nhs.uk/css/screen.css (11.5 hours)
http://www.nhs.uk/css/base.css (11.5 hours)
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D (11.5 hours)
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D (11.5 hours)
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js (11.5 hours)
http://www.nhs.uk/css/homepage-refresh.css (11.5 hours)
http://www.nhs.uk/css/homepage.css (11.6 hours)
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 (11.6 hours)
http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D (15.1 hours)
http://www.nhs.uk/css/print.css (expiration not specified)
http://www.nhs.uk/css/refresh.css (expiration not specified)
http://www.nhs.uk/css/report-comments.css (expiration not specified)
http://www.nhs.uk/css/reset.css (expiration not specified)
http://www.nhs.uk/img/gov-uk.gif (expiration not specified)
http://www.nhs.uk/img/header/choices-logo.gif (expiration not specified)
http://www.nhs.uk/img/information-standards.gif (expiration not specified)
http://www.nhs.uk/img/login.png (expiration not specified)
http://www.nhs.uk/img/notifications/icon-close-das.gif (expiration not specified)
http://www.nhs.uk/img/search-magnifying-glass.png (expiration not specified)
http://www.nhs.uk/includes/AC_RunActiveContent.js (expiration not specified)
http://www.nhs.uk/includes/choices.js (expiration not specified)
http://www.nhs.uk/includes/jquery-1.11.3.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery-1.7.1.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery.bgiframe.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery.cookie.js (expiration not specified)
http://www.nhs.uk/includes/nhs.typeahead.js (expiration not specified)
http://www.nhs.uk/includes/translate.js (expiration not specified)
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.load.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.min.js (expiration not specified)
https://translate.googleapis.com/translate_static/css/translateelement.css (60 minutes)
https://translate.googleapis.com/translate_static/…ent/34/element_main.js (60 minutes)
https://translate.googleapis.com/translate_static/js/element/main.js (60 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
http://www.nhs.uk/includes/swfobject.js (11.5 hours)
http://www.nhs.uk/css/screen.css (11.5 hours)
http://www.nhs.uk/css/base.css (11.5 hours)
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D (11.5 hours)
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D (11.5 hours)
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js (11.5 hours)
http://www.nhs.uk/css/homepage-refresh.css (11.5 hours)
http://www.nhs.uk/css/homepage.css (11.6 hours)
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 (11.6 hours)
http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D (15.1 hours)
priority - 18Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 18 blocking script resources and 8 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
http://www.nhs.uk/includes/jquery-1.7.1.min.js
http://www.nhs.uk/includes/jquery.bgiframe.min.js
http://www.nhs.uk/includes/jquery.cookie.js
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js
http://www.nhs.uk/includes/swfobject.js
http://www.nhs.uk/includes/AC_RunActiveContent.js
http://translate.google.com/translate_a/element.js…leTranslateElementInit
http://www.nhs.uk/includes/translate.js
http://www.nhs.uk/includes/choices.js
http://www.nhs.uk/includes/webtrends.load.js
http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D
http://www.nhs.uk/includes/jquery-1.11.3.min.js
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js
http://www.nhs.uk/includes/nhs.typeahead.js
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2
http://www.nhs.uk/includes/jquery.bgiframe.min.js
http://www.nhs.uk/includes/jquery.cookie.js
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js
http://www.nhs.uk/includes/swfobject.js
http://www.nhs.uk/includes/AC_RunActiveContent.js
http://translate.google.com/translate_a/element.js…leTranslateElementInit
http://www.nhs.uk/includes/translate.js
http://www.nhs.uk/includes/choices.js
http://www.nhs.uk/includes/webtrends.load.js
http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D
http://www.nhs.uk/includes/jquery-1.11.3.min.js
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js
http://www.nhs.uk/includes/nhs.typeahead.js
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2
Optimize CSS Delivery of the following:
https://translate.googleapis.com/translate_static/css/translateelement.css
http://www.nhs.uk/css/base.css
http://www.nhs.uk/css/reset.css
http://www.nhs.uk/css/screen.css
http://www.nhs.uk/css/homepage.css
http://www.nhs.uk/css/report-comments.css
http://www.nhs.uk/css/refresh.css
http://www.nhs.uk/css/homepage-refresh.css
http://www.nhs.uk/css/base.css
http://www.nhs.uk/css/reset.css
http://www.nhs.uk/css/screen.css
http://www.nhs.uk/css/homepage.css
http://www.nhs.uk/css/report-comments.css
http://www.nhs.uk/css/refresh.css
http://www.nhs.uk/css/homepage-refresh.css
priority - 9Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 88KiB (29% reduction).
Minifying http://www.nhs.uk/includes/choices.js could save 55KiB (38% reduction).
Minifying http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D could save 11.1KiB (17% reduction).
Minifying http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 9.1KiB (14% reduction).
Minifying http://s.webtrends.com/js/webtrends.hm.js could save 3.5KiB (49% reduction).
Minifying http://www.nhs.uk/includes/jquery.cookie.js could save 3.2KiB (76% reduction).
Minifying http://www.nhs.uk/includes/translate.js could save 2.9KiB (50% reduction).
Minifying http://www.nhs.uk/includes/nhs.typeahead.js could save 1.3KiB (39% reduction).
Minifying http://www.nhs.uk/includes/swfobject.js could save 1KiB (14% reduction).
Minifying http://www.nhs.uk/includes/AC_RunActiveContent.js could save 1KiB (31% reduction).
Minifying http://www.nhs.uk/_layouts/1033/init.js?rev=SKi7C%…sh1U%2FCnIwkB9Ag%3D%3D could save 11.1KiB (17% reduction).
Minifying http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 9.1KiB (14% reduction).
Minifying http://s.webtrends.com/js/webtrends.hm.js could save 3.5KiB (49% reduction).
Minifying http://www.nhs.uk/includes/jquery.cookie.js could save 3.2KiB (76% reduction).
Minifying http://www.nhs.uk/includes/translate.js could save 2.9KiB (50% reduction).
Minifying http://www.nhs.uk/includes/nhs.typeahead.js could save 1.3KiB (39% reduction).
Minifying http://www.nhs.uk/includes/swfobject.js could save 1KiB (14% reduction).
Minifying http://www.nhs.uk/includes/AC_RunActiveContent.js could save 1KiB (31% reduction).
priority - 3Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 31.4KiB (32% reduction).
Losslessly compressing http://www.nhs.uk/PublishingImages/Personalisation…es/newsletterpromo.jpg could save 16.7KiB (62% reduction).
Losslessly compressing http://www.nhs.uk/img/information-standards.gif could save 2.5KiB (29% reduction).
Losslessly compressing http://www.nhs.uk/PersonalisationModules/Publishin…ages/image-small-4.jpg could save 2.5KiB (16% reduction).
Losslessly compressing http://www.nhs.uk/PersonalisationModules/Publishin…es/pregnancy-ducks.jpg could save 2.5KiB (13% reduction).
Losslessly compressing http://www.nhs.uk/PersonalisationModules/Publishin…ges/logo-giveblood.png could save 1.7KiB (22% reduction).
Losslessly compressing http://www.nhs.uk/news/2016/06June/PublishingImage…s-brain_C0294657_T.jpg could save 1.7KiB (18% reduction).
Losslessly compressing http://www.nhs.uk/PublishingImages/nhs-services.jpg could save 1.5KiB (30% reduction).
Losslessly compressing http://www.nhs.uk/img/gov-uk.gif could save 895B (25% reduction).
Losslessly compressing http://www.nhs.uk/img/login.png could save 831B (77% reduction).
Losslessly compressing http://www.nhs.uk/img/search-magnifying-glass.png could save 696B (51% reduction).
Losslessly compressing http://www.nhs.uk/img/information-standards.gif could save 2.5KiB (29% reduction).
Losslessly compressing http://www.nhs.uk/PersonalisationModules/Publishin…ages/image-small-4.jpg could save 2.5KiB (16% reduction).
Losslessly compressing http://www.nhs.uk/PersonalisationModules/Publishin…es/pregnancy-ducks.jpg could save 2.5KiB (13% reduction).
Losslessly compressing http://www.nhs.uk/PersonalisationModules/Publishin…ges/logo-giveblood.png could save 1.7KiB (22% reduction).
Losslessly compressing http://www.nhs.uk/news/2016/06June/PublishingImage…s-brain_C0294657_T.jpg could save 1.7KiB (18% reduction).
Losslessly compressing http://www.nhs.uk/PublishingImages/nhs-services.jpg could save 1.5KiB (30% reduction).
Losslessly compressing http://www.nhs.uk/img/gov-uk.gif could save 895B (25% reduction).
Losslessly compressing http://www.nhs.uk/img/login.png could save 831B (77% reduction).
Losslessly compressing http://www.nhs.uk/img/search-magnifying-glass.png could save 696B (51% reduction).
priority - 3Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://www.nhs.uk/
http://www.nhs.uk/Pages/HomePage.aspx
http://www.nhs.uk/pages/home.aspx
http://www.nhs.uk/Pages/HomePage.aspx
http://www.nhs.uk/pages/home.aspx
www.nhs.uk Desktop Resource Breakdown
| Total Resources | 58 |
| Number of Hosts | 7 |
| Static Resources | 37 |
| JavaScript Resources | 24 |
| CSS Resources | 9 |
www.nhs.uk mobile page speed rank
Last tested: 2017-05-06
Mobile Speed
Bad
33/100
www.nhs.uk Mobile Speed Test Quick Summary
priority - 85Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 825.2KiB (75% reduction).
Compressing http://www.nhs.uk/includes/choices.js could save 143.6KiB (81% reduction).
Compressing http://www.nhs.uk/css/screen.css could save 111.2KiB (82% reduction).
Compressing http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js could save 76.8KiB (72% reduction).
Compressing http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 could save 73.4KiB (75% reduction).
Compressing http://www.nhs.uk/css/homepage.css could save 64.1KiB (87% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.11.3.min.js could save 61.2KiB (65% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.7.1.min.js could save 59.3KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 52.5KiB (80% reduction).
Compressing http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D could save 50.4KiB (76% reduction).
Compressing http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js could save 27.7KiB (70% reduction).
Compressing http://www.nhs.uk/css/print.css could save 19KiB (77% reduction).
Compressing http://www.nhs.uk/externalservices/surveyfeedapi/api/bannerfeed could save 17.6KiB (92% reduction).
Compressing http://www.nhs.uk/includes/webtrends.min.js could save 15.2KiB (64% reduction).
Compressing http://www.nhs.uk/css/refresh.css could save 15.1KiB (78% reduction).
Compressing http://www.nhs.uk/css/homepage-refresh.css could save 11.9KiB (63% reduction).
Compressing http://www.nhs.uk/includes/swfobject.js could save 5.2KiB (69% reduction).
Compressing http://s.webtrends.com/js/webtrends.hm.js could save 5.2KiB (71% reduction).
Compressing http://www.nhs.uk/includes/translate.js could save 4.3KiB (74% reduction).
Compressing http://www.nhs.uk/includes/jquery.cookie.js could save 2.7KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D could save 2.6KiB (66% reduction).
Compressing http://www.nhs.uk/includes/nhs.typeahead.js could save 2.3KiB (69% reduction).
Compressing http://www.nhs.uk/includes/AC_RunActiveContent.js could save 2.2KiB (68% reduction).
Compressing http://www.nhs.uk/css/report-comments.css could save 1.3KiB (71% reduction).
Compressing http://www.nhs.uk/includes/jquery.bgiframe.min.js could save 648B (47% reduction).
Compressing http://www.nhs.uk/css/screen.css could save 111.2KiB (82% reduction).
Compressing http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js could save 76.8KiB (72% reduction).
Compressing http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 could save 73.4KiB (75% reduction).
Compressing http://www.nhs.uk/css/homepage.css could save 64.1KiB (87% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.11.3.min.js could save 61.2KiB (65% reduction).
Compressing http://www.nhs.uk/includes/jquery-1.7.1.min.js could save 59.3KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 52.5KiB (80% reduction).
Compressing http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D could save 50.4KiB (76% reduction).
Compressing http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js could save 27.7KiB (70% reduction).
Compressing http://www.nhs.uk/css/print.css could save 19KiB (77% reduction).
Compressing http://www.nhs.uk/externalservices/surveyfeedapi/api/bannerfeed could save 17.6KiB (92% reduction).
Compressing http://www.nhs.uk/includes/webtrends.min.js could save 15.2KiB (64% reduction).
Compressing http://www.nhs.uk/css/refresh.css could save 15.1KiB (78% reduction).
Compressing http://www.nhs.uk/css/homepage-refresh.css could save 11.9KiB (63% reduction).
Compressing http://www.nhs.uk/includes/swfobject.js could save 5.2KiB (69% reduction).
Compressing http://s.webtrends.com/js/webtrends.hm.js could save 5.2KiB (71% reduction).
Compressing http://www.nhs.uk/includes/translate.js could save 4.3KiB (74% reduction).
Compressing http://www.nhs.uk/includes/jquery.cookie.js could save 2.7KiB (64% reduction).
Compressing http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D could save 2.6KiB (66% reduction).
Compressing http://www.nhs.uk/includes/nhs.typeahead.js could save 2.3KiB (69% reduction).
Compressing http://www.nhs.uk/includes/AC_RunActiveContent.js could save 2.2KiB (68% reduction).
Compressing http://www.nhs.uk/css/report-comments.css could save 1.3KiB (71% reduction).
Compressing http://www.nhs.uk/includes/jquery.bgiframe.min.js could save 648B (47% reduction).
priority - 72Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 18 blocking script resources and 8 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
http://www.nhs.uk/includes/jquery-1.7.1.min.js
http://www.nhs.uk/includes/jquery.bgiframe.min.js
http://www.nhs.uk/includes/jquery.cookie.js
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js
http://www.nhs.uk/includes/swfobject.js
http://www.nhs.uk/includes/AC_RunActiveContent.js
http://translate.google.com/translate_a/element.js…leTranslateElementInit
http://www.nhs.uk/includes/translate.js
http://www.nhs.uk/includes/choices.js
http://www.nhs.uk/includes/webtrends.load.js
http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D
http://www.nhs.uk/includes/jquery-1.11.3.min.js
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js
http://www.nhs.uk/includes/nhs.typeahead.js
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2
http://www.nhs.uk/includes/jquery.bgiframe.min.js
http://www.nhs.uk/includes/jquery.cookie.js
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js
http://www.nhs.uk/includes/swfobject.js
http://www.nhs.uk/includes/AC_RunActiveContent.js
http://translate.google.com/translate_a/element.js…leTranslateElementInit
http://www.nhs.uk/includes/translate.js
http://www.nhs.uk/includes/choices.js
http://www.nhs.uk/includes/webtrends.load.js
http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D
http://www.nhs.uk/includes/jquery-1.11.3.min.js
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js
http://www.nhs.uk/includes/nhs.typeahead.js
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2
Optimize CSS Delivery of the following:
https://translate.googleapis.com/translate_static/css/translateelement.css
http://www.nhs.uk/css/base.css
http://www.nhs.uk/css/reset.css
http://www.nhs.uk/css/screen.css
http://www.nhs.uk/css/homepage.css
http://www.nhs.uk/css/report-comments.css
http://www.nhs.uk/css/refresh.css
http://www.nhs.uk/css/homepage-refresh.css
http://www.nhs.uk/css/base.css
http://www.nhs.uk/css/reset.css
http://www.nhs.uk/css/screen.css
http://www.nhs.uk/css/homepage.css
http://www.nhs.uk/css/report-comments.css
http://www.nhs.uk/css/refresh.css
http://www.nhs.uk/css/homepage-refresh.css
priority - 26Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
http://s.webtrends.com/js/webtrends.hm.js (expiration not specified)
http://www.nhs.uk/css/base.css (expiration not specified)
http://www.nhs.uk/css/homepage-refresh.css (expiration not specified)
http://www.nhs.uk/css/print.css (expiration not specified)
http://www.nhs.uk/css/refresh.css (expiration not specified)
http://www.nhs.uk/img/gov-uk.gif (expiration not specified)
http://www.nhs.uk/img/header/choices-logo.gif (expiration not specified)
http://www.nhs.uk/img/information-standards.gif (expiration not specified)
http://www.nhs.uk/img/login.png (expiration not specified)
http://www.nhs.uk/includes/AC_RunActiveContent.js (expiration not specified)
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery.bgiframe.min.js (expiration not specified)
http://www.nhs.uk/includes/swfobject.js (expiration not specified)
http://www.nhs.uk/includes/translate.js (expiration not specified)
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.load.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.min.js (expiration not specified)
https://translate.googleapis.com/translate_static/css/translateelement.css (60 minutes)
https://translate.googleapis.com/translate_static/js/element/main.js (60 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 (3 hours)
http://www.nhs.uk/includes/choices.js (10.2 hours)
http://www.nhs.uk/img/search-magnifying-glass.png (10.4 hours)
http://www.nhs.uk/css/screen.css (13.5 hours)
http://www.nhs.uk/includes/jquery-1.11.3.min.js (15.6 hours)
http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D (17.5 hours)
http://www.nhs.uk/includes/jquery.cookie.js (19.3 hours)
http://www.nhs.uk/includes/jquery-1.7.1.min.js (19.4 hours)
http://www.nhs.uk/includes/nhs.typeahead.js (19.4 hours)
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D (20.5 hours)
http://www.nhs.uk/css/reset.css (20.8 hours)
http://www.nhs.uk/img/notifications/icon-close-das.gif (21 hours)
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js (21 hours)
http://www.nhs.uk/css/homepage.css (21.6 hours)
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D (23 hours)
http://www.nhs.uk/css/report-comments.css (23.1 hours)
http://www.nhs.uk/css/base.css (expiration not specified)
http://www.nhs.uk/css/homepage-refresh.css (expiration not specified)
http://www.nhs.uk/css/print.css (expiration not specified)
http://www.nhs.uk/css/refresh.css (expiration not specified)
http://www.nhs.uk/img/gov-uk.gif (expiration not specified)
http://www.nhs.uk/img/header/choices-logo.gif (expiration not specified)
http://www.nhs.uk/img/information-standards.gif (expiration not specified)
http://www.nhs.uk/img/login.png (expiration not specified)
http://www.nhs.uk/includes/AC_RunActiveContent.js (expiration not specified)
http://www.nhs.uk/includes/jquery-ui-1.8.22.custom.min.js (expiration not specified)
http://www.nhs.uk/includes/jquery.bgiframe.min.js (expiration not specified)
http://www.nhs.uk/includes/swfobject.js (expiration not specified)
http://www.nhs.uk/includes/translate.js (expiration not specified)
http://www.nhs.uk/includes/typeahead.bundle.min.jq1113.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.load.js (expiration not specified)
http://www.nhs.uk/includes/webtrends.min.js (expiration not specified)
https://translate.googleapis.com/translate_static/css/translateelement.css (60 minutes)
https://translate.googleapis.com/translate_static/js/element/main.js (60 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
http://www.nhs.uk/ScriptResource.axd?d=fUYwbjL7_OI…sjZmU4T6EM1&t=2e2045e2 (3 hours)
http://www.nhs.uk/includes/choices.js (10.2 hours)
http://www.nhs.uk/img/search-magnifying-glass.png (10.4 hours)
http://www.nhs.uk/css/screen.css (13.5 hours)
http://www.nhs.uk/includes/jquery-1.11.3.min.js (15.6 hours)
http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D (17.5 hours)
http://www.nhs.uk/includes/jquery.cookie.js (19.3 hours)
http://www.nhs.uk/includes/jquery-1.7.1.min.js (19.4 hours)
http://www.nhs.uk/includes/nhs.typeahead.js (19.4 hours)
http://www.nhs.uk/_layouts/1033/msstring.js?rev=fc…tJqYMECz%2BNiH7Q%3D%3D (20.5 hours)
http://www.nhs.uk/css/reset.css (20.8 hours)
http://www.nhs.uk/img/notifications/icon-close-das.gif (21 hours)
http://www.nhs.uk/service-search/Scripts/findandcompare.widget.js (21 hours)
http://www.nhs.uk/css/homepage.css (21.6 hours)
http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D (23 hours)
http://www.nhs.uk/css/report-comments.css (23.1 hours)
priority - 18Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 171.3KiB (58% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…stfeeding_adr8kr_H.jpg could save 79KiB (78% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…mages/head-image-7.jpg could save 45.5KiB (50% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…nd-washing-video_H.jpg could save 17.2KiB (48% reduction).
Compressing http://www.nhs.uk/PublishingImages/Personalisation…es/newsletterpromo.jpg could save 14.9KiB (82% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…S/heartage-628x227.jpg could save 7.7KiB (28% reduction).
Compressing http://www.nhs.uk/PublishingImages/nhs-services.jpg could save 2.9KiB (58% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…ges/logo-giveblood.png could save 1.7KiB (22% reduction).
Compressing http://www.nhs.uk/img/search-magnifying-glass.png could save 936B (68% reduction).
Compressing http://www.nhs.uk/img/login.png could save 883B (82% reduction).
Compressing http://www.nhs.uk/img/gov-uk.gif could save 600B (17% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…mages/head-image-7.jpg could save 45.5KiB (50% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…nd-washing-video_H.jpg could save 17.2KiB (48% reduction).
Compressing http://www.nhs.uk/PublishingImages/Personalisation…es/newsletterpromo.jpg could save 14.9KiB (82% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…S/heartage-628x227.jpg could save 7.7KiB (28% reduction).
Compressing http://www.nhs.uk/PublishingImages/nhs-services.jpg could save 2.9KiB (58% reduction).
Compressing http://www.nhs.uk/PersonalisationModules/Publishin…ges/logo-giveblood.png could save 1.7KiB (22% reduction).
Compressing http://www.nhs.uk/img/search-magnifying-glass.png could save 936B (68% reduction).
Compressing http://www.nhs.uk/img/login.png could save 883B (82% reduction).
Compressing http://www.nhs.uk/img/gov-uk.gif could save 600B (17% reduction).
priority - 11Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 108.2KiB (32% reduction).
Minifying http://www.nhs.uk/includes/choices.js could save 75.1KiB (43% reduction).
Minifying http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D could save 11.1KiB (17% reduction).
Minifying http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 9.1KiB (14% reduction).
Minifying http://s.webtrends.com/js/webtrends.hm.js could save 3.5KiB (49% reduction).
Minifying http://www.nhs.uk/includes/jquery.cookie.js could save 3.2KiB (76% reduction).
Minifying http://www.nhs.uk/includes/translate.js could save 2.9KiB (50% reduction).
Minifying http://www.nhs.uk/includes/nhs.typeahead.js could save 1.3KiB (40% reduction).
Minifying http://www.nhs.uk/includes/swfobject.js could save 1KiB (14% reduction).
Minifying http://www.nhs.uk/includes/AC_RunActiveContent.js could save 1KiB (31% reduction).
Minifying http://www.nhs.uk/_layouts/1033/init.js?rev=w7H9f6YxfzEXRgXKUMfiTg%3D%3D could save 11.1KiB (17% reduction).
Minifying http://www.nhs.uk/_layouts/1033/non_ie.js?rev=yfNr…0Gwa%2FPDNGrqXVg%3D%3D could save 9.1KiB (14% reduction).
Minifying http://s.webtrends.com/js/webtrends.hm.js could save 3.5KiB (49% reduction).
Minifying http://www.nhs.uk/includes/jquery.cookie.js could save 3.2KiB (76% reduction).
Minifying http://www.nhs.uk/includes/translate.js could save 2.9KiB (50% reduction).
Minifying http://www.nhs.uk/includes/nhs.typeahead.js could save 1.3KiB (40% reduction).
Minifying http://www.nhs.uk/includes/swfobject.js could save 1KiB (14% reduction).
Minifying http://www.nhs.uk/includes/AC_RunActiveContent.js could save 1KiB (31% reduction).
priority - 10Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://www.nhs.uk/
http://www.nhs.uk/Pages/HomePage.aspx
http://www.nhs.uk/pages/home.aspx
http://www.nhs.uk/Pages/HomePage.aspx
http://www.nhs.uk/pages/home.aspx
www.nhs.uk Mobile Resource Breakdown
| Total Resources | 55 |
| Number of Hosts | 7 |
| Static Resources | 37 |
| JavaScript Resources | 25 |
| CSS Resources | 9 |
www.nhs.uk mobile page usability
Last tested: 2017-05-06
Mobile Usability
Good
97/100
www.nhs.uk Mobile Usability Test Quick Summary
priority - 2Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target
<label for="q">Enter a search term:</label> is close to 2 other tap targets.The tap target
<label for="q">Enter a search term:</label> and 1 others are close to other tap targets.The tap target
<label for="q">Enter a search term:</label> and 2 others are close to other tap targets.The tap target
<a href="/conditions/st…roduction.aspx">Stomach ache</a> and 4 others are close to other tap targets.The tap target
<input id="ctl00_PlaceHol…l00_urgentcare" type="radio" name="ctl00$PlaceHol…$ctl00$service"> and 2 others are close to other tap targets.www.nhs.uk HTML validation
Warnings
The “type” attribute is unnecessary for JavaScript resources.
Line: 91 Column: 7 - 44
"... <script type="application/javascript">window..."
"... <script type="application/javascript">window..."
The “banner” role is unnecessary for element “header”.
Line: 148 Column: 7 - 49
"...> <header class="nhsuk-header" role="banner"> <di..."
"...> <header class="nhsuk-header" role="banner"> <di..."
The “navigation” role is unnecessary for element “nav”.
Line: 207 Column: 5 - 150
"...> <nav class="nhsuk-header__navigation" id="header-navigation" role="navigation" aria-label="Primary navigation" aria-labelledby="label-navigation"> <p ..."
"...> <nav class="nhsuk-header__navigation" id="header-navigation" role="navigation" aria-label="Primary navigation" aria-labelledby="label-navigation"> <p ..."
The “main” role is unnecessary for element “main”.
Line: 291 Column: 5 - 112
"...ull"> <main class="nhsuk-main-wrapper nhsuk-main-wrapper--no-padding nhsuk-homepage" id="maincontent" role="main"> ..."
"...ull"> <main class="nhsuk-main-wrapper nhsuk-main-wrapper--no-padding nhsuk-homepage" id="maincontent" role="main"> ..."
The “contentinfo” role is unnecessary for element “footer”.
Line: 898 Column: 1 - 27
"... <footer role="contentinfo"> <di..."
"... <footer role="contentinfo"> <di..."
Errors
Attribute “src” not allowed on element “image” at this point.
Line: 155 Column: 7 - 75
"...th> <image src="https://assets.nhs.uk/images/nhs-logo.png" xlink:href=""></imag..."
"...th> <image src="https://assets.nhs.uk/images/nhs-logo.png" xlink:href=""></imag..."
Element “image” is missing required attribute “height”.
Line: 155 Column: 7 - 75
"...th> <image src="https://assets.nhs.uk/images/nhs-logo.png" xlink:href=""></imag..."
"...th> <image src="https://assets.nhs.uk/images/nhs-logo.png" xlink:href=""></imag..."
Element “image” is missing required attribute “width”.
Line: 155 Column: 7 - 75
"...th> <image src="https://assets.nhs.uk/images/nhs-logo.png" xlink:href=""></imag..."
"...th> <image src="https://assets.nhs.uk/images/nhs-logo.png" xlink:href=""></imag..."
Bad value “tel: 111” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Line: 587 Column: 159 - 177
"...uk</a> or <a href="tel: 111">call 1..."
"...uk</a> or <a href="tel: 111">call 1..."
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www.nhs.uk Ping
Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.
www.nhs.uk TRACEROUTE
Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.