britishgas.co.uk

https://britishgas.co.uk· First analyzed 28 Apr 2026· Updated 28 Apr 2026

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britishgas.co.uk

Mobile

Sponsored

Hosting Provider

F5 Distributed cloud services

IP Address

159.60.150.174

Site Location

🇬🇧 Windsor,, United Kingdomvia schema_nap

Server Location

🇫🇷 Suresnes, France

ASN

AS35280

Organization

F5 Distributed cloud services

Server

volt-adc

CDN

CloudFront

Nameservers

dns2.comlaude-dns.net.dns3.comlaude-dns.co.uk.dns4.comlaude-dns.eu.dns1.comlaude-dns.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.7 s10%

Speed Index

3.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.2 MB

61 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

Adobe Experience Manager

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Technology Stack

10 Technologies Detected

CSS Frameworks

Analytics

Libraries

Icon Libraries

Advertising

Reviews

SEO Analysis

B70/100

Meta Tags14/15

Content8/12

Headings8/8

Technical22/25

E-E-A-T2/7

Images0/7

Links1/5

URL5/5

Social4/5

Freshness0/4

Mobile3/4

Indexability3/3

britishgas.co.ukbritishgas.co.uk

Gas and electricity, boilers and energy efficiency - British Gas

British Gas is the largest UK energy and home services company. We supply gas and electricity, boilers and boiler cover as well as other home services.

Title Length64 chars

Recommended: 50-60 chars (~380px / 580px)

Description Length151 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

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Crawlability

Sitemap

Type: standard

187 URLs

robots.txt

78 rules

Sitemap reference found

Local SEO

Local Search Readiness

23/100

Needs Work

6 14

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

3/25

Citation

12/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:2%

Words:636

Token eff.:Optimal

Structured Data

1 JSON-LD

Organization×1.1

sameAs entity links

Citation Readiness

Opening Summary15w

Descriptive Headingsavg 5.1w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

78/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

16/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

35/100

147 mg

CO₂e / view

1.2 MB

Page Weight

70%

Cleaner Than

New Visitor

169 mg

Returning (cached)

84 mg

Annual (10K/mo)

17.7 kg

Emission Segments

Data Center

33 mg

Network

35 mg

Device

79 mg

Resource Breakdown

JavaScript

779.9 KB

Images

344.3 KB

CSS

46.5 KB

HTML

16.4 KB

Other

4.9 KB

Green Hosting Not Verified

F5 Distributed cloud services

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

181d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.09.2025

Valid Until

26.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (5)

britishgas.co.ukwww.britishgas.co.ukorigin.britishgas.co.ukwww.scottishgas.co.ukscottishgas.co.uk

SHA-256 Fingerprint

A9:6D:83:1B:A3:53:9D:21:26:91:1F:95:A7:C1:86:D0:EF:E4:A7:5C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

199385

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=utf-8

date

Mon, 27 Apr 2026 06:33:51 GMT

server

volt-adc

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

britishgas-co-uk.mail.protection.outlook.com

Domain Information

britishgas.co.uk

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

74/100

Mobile Friendly156 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

British Gas Subhead + British Gas Body

WCAG Partial

65/100

Readability

/30

21/30

14px · LH 1.50

Hierarchy

/20

16/20

4.84x ratio · ✓ H1→H6

WCAG

/25

12/25

1:1 min contrast

Performance

/25

16/25

3 fonts · 3 req

Heading Font

British Gas Subhead

Sans69px

Body Font

British Gas Body

Sans14px

Contrast Ratio

1:1

5 issues

Reading Comfort

~35 CPL

Narrow lines

69px

40px

28px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Easy to read: Flesch score 71/100 — accessible to general audiences.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 4.8x larger than body text.

Buy on MyFontsFlesch 71

Color Palette

8 unique colors

Light

#ffffff

Background· 26.400000000000002%

#2282e6

Accent· 32.800000000000004%

#005eb8

Primary· 0%

#00308a

Accent· 14.3%

#4aaff8

Accent· 9.7%

#389ef2

Accent· 7.6%

#9ebbcc

Secondary· 4.8%

#216ac0

Accent· 3.6%

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Twitter/X AdsMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(6)local(5)assets.adobedtm.com(4)britishgas.co.uk(2)assets.webchat.connect.centrica.com(1)

Website Identity

British Gas

Organization

British Gas is the largest UK energy and home services company. We supply gas and electricity, boilers and boiler cover as well as other home services.

www.britishgas.co.uk/index.html

Maidenhead Road, Windsor,

SL4 5GD, Windsor,, Berkshire

Location detected: 🇬🇧 United Kingdom, Windsor,via schema_nap

📧 Microsoft 365en-GB

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Last analyzed: 28 Apr 2026 at 01:23

Historical Analysis & Change Tracking