Report Summary

  • 50

    Performance

    Renders faster than
    70% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 85% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 99

    SEO

    Google-friendlier than
    94% of websites

londonboxoffice.co.uk

London Theatre Tickets - London Box Office

Page Load Speed

3.3 sec in total

First Response

620 ms

Resources Loaded

2.3 sec

Page Rendered

336 ms

londonboxoffice.co.uk screenshot

About Website

Click here to check amazing London Box Office content for United Kingdom. Otherwise, check out these important facts you probably never knew about londonboxoffice.co.uk

Find tickets for all West End shows, up to 70% off. Cheap theatre tickets in London from London Box Office. Book now!

Visit londonboxoffice.co.uk

Key Findings

We analyzed Londonboxoffice.co.uk page load time and found that the first response time was 620 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

londonboxoffice.co.uk performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

25/100

25%

SI (Speed Index)

Value5.1 s

61/100

10%

TBT (Total Blocking Time)

Value540 ms

54/100

30%

CLS (Cumulative Layout Shift)

Value0.155

74/100

15%

TTI (Time to Interactive)

Value7.6 s

46/100

10%

Network Requests Diagram

www.londonboxoffice.co.uk

620 ms

lboResponsive_1.16.2_gb.css

248 ms

logo.svg

320 ms

facebook.png

302 ms

google.png

301 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 84% of them (51 requests) were addressed to the original Londonboxoffice.co.uk, 3% (2 requests) were made to Google-analytics.com and 3% (2 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (992 ms) belongs to the original domain Londonboxoffice.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 474.0 kB (31%)

Content Size

1.6 MB

After Optimization

1.1 MB

In fact, the total size of Londonboxoffice.co.uk main page is 1.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. Images take 954.9 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 93.5 kB

  • Original 109.9 kB
  • After minification 90.9 kB
  • After compression 16.4 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. This page needs HTML code to be minified as it can gain 19.0 kB, which is 17% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 93.5 kB or 85% of the original size.

Image Optimization

-4%

Potential reduce by 41.5 kB

  • Original 954.9 kB
  • After minification 913.3 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. London Box Office images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 224.7 kB

  • Original 347.5 kB
  • After minification 342.9 kB
  • After compression 122.7 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 224.7 kB or 65% of the original size.

CSS Optimization

-82%

Potential reduce by 114.2 kB

  • Original 140.0 kB
  • After minification 137.2 kB
  • After compression 25.8 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. Londonboxoffice.co.uk needs all CSS files to be minified and compressed as it can save up to 114.2 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (20%)

Requests Now

59

After Optimization

47

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of London Box 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 7 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

londonboxoffice.co.uk accessibility score

94

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

londonboxoffice.co.uk best practices score

75

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

SEO Factors

londonboxoffice.co.uk SEO score

99

Search Engine Optimization Advices

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Londonboxoffice.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Londonboxoffice.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of London Box 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: