Report Summary

  • 7

    Performance

    Renders faster than
    22% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 68

    SEO

    Google-friendlier than
    28% of websites

library.metoffice.gov.uk

Met Office - Search

Page Load Speed

2.3 sec in total

First Response

173 ms

Resources Loaded

2 sec

Page Rendered

129 ms

library.metoffice.gov.uk screenshot

About Website

Visit library.metoffice.gov.uk now to see the best up-to-date Library Met Office content for United Kingdom and also check out these interesting facts you probably never knew about library.metoffice.gov.uk

Visit library.metoffice.gov.uk

Key Findings

We analyzed Library.metoffice.gov.uk page load time and found that the first response time was 173 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

library.metoffice.gov.uk performance score

7

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value17.0 s

0/100

10%

LCP (Largest Contentful Paint)

Value19.0 s

0/100

25%

SI (Speed Index)

Value41.5 s

0/100

10%

TBT (Total Blocking Time)

Value1,820 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0.369

29/100

15%

TTI (Time to Interactive)

Value19.0 s

3/100

10%

Network Requests Diagram

library.metoffice.gov.uk

173 ms

Index.aspx

83 ms

Index.aspx

164 ms

AdvancedSearch.aspx

616 ms

MM10326UK_Theme_Custom_Met%20Office%20Basic.css

174 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 88% of them (23 requests) were addressed to the original Library.metoffice.gov.uk, 12% (3 requests) were made to M10326uk.eos-intl.eu. The less responsive or slowest element that took the longest time to load (643 ms) relates to the external source M10326uk.eos-intl.eu.

Page Optimization Overview & Recommendations

Page size can be reduced by 514.1 kB (61%)

Content Size

848.1 kB

After Optimization

334.1 kB

In fact, the total size of Library.metoffice.gov.uk main page is 848.1 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Javascripts take 422.3 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 128.3 kB

  • Original 154.9 kB
  • After minification 150.0 kB
  • After compression 26.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 128.3 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 87 B

  • Original 201.3 kB
  • After minification 201.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Library Met Office images are well optimized though.

JavaScript Optimization

-77%

Potential reduce by 325.5 kB

  • Original 422.3 kB
  • After minification 369.3 kB
  • After compression 96.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 325.5 kB or 77% of the original size.

CSS Optimization

-86%

Potential reduce by 60.2 kB

  • Original 69.6 kB
  • After minification 58.0 kB
  • After compression 9.4 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Library.metoffice.gov.uk needs all CSS files to be minified and compressed as it can save up to 60.2 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (64%)

Requests Now

22

After Optimization

8

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Library Met Office. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

library.metoffice.gov.uk accessibility score

91

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Buttons do not have an accessible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Best Practices

library.metoffice.gov.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

library.metoffice.gov.uk SEO score

68

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

Page is blocked from indexing

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Library.metoffice.gov.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Library.metoffice.gov.uk main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Library Met Office. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: