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bas.ac.uk

https://bas.ac.uk· First analyzed 23 Apr 2026· Updated 23 Apr 2026
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bas.ac.uk
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Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

54.228.199.127

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS EC2 (eu-west-1)

Server

Nginx

CDN

CloudFront

Nameservers

nile.ns.cloudflare.com.april.ns.cloudflare.com.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
855 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.7 MB
54 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
WordPressv6.9.4
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

10 Technologies Detected

Plugins

5
Analytics With ConsentElasticpress
TablePress
The Events Calendar
Yoast SEO

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

SEO Analysis

A81/100
24
7
0
Meta Tags11/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T2/7
Images4/7
Links2/5
URL5/5
Social4/5
Freshness4/4
Mobile4/4
Indexability3/3
B
bas.ac.ukbas.ac.uk

Homepage - British Antarctic Survey

Uncovering the secrets of Earth's polar and frozen regions - from the depths of the oceans to the inner edge of space.

Title Length35 chars

Recommended: 50-60 chars (~213px / 580px)

Description Length118 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    26 URLs

    26 sub-sitemaps

    robots.txt

    3 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    22/100
    Needs Work
    7 10

    Sponsored

    AI & LLM Readiness

    D58/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    7/25
    Citation
    17/25

    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
    blockquotesnavheader/footer
    Text ratio:4%
    Words:742
    Token eff.:Optimal
    Sections/1K:36.4
    Depth:3/5

    Structured Data

    5 JSON-LD
    Organization×1.1WebSiteBreadcrumbListSearchAction

    Citation Readiness

    Opening Summary138w
    Descriptive Headingsavg 5.9w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (7)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    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.
    A
    87/100
    15
    Passed
    1
    Critical
    0
    Warnings
    Images & Alt Text
    15/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    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
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    40/100
    F
    482 mg
    CO₂e / view
    4.7 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    551 mg
    vs
    Returning (cached)
    275 mg
    Annual (10K/mo)
    57.8 kg
    Emission Segments
    Data Center
    24 mg
    Network
    142 mg
    Device
    317 mg
    Resource Breakdown
    JavaScript
    8.3 KB
    Images
    4.5 MB
    CSS
    124.7 KB
    HTML
    27.3 KB
    Other
    43.1 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    232d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Amazon

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    12.11.2025

    Valid Until

    11.12.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    bas.ac.ukwww.bas.ac.uk

    SHA-256 Fingerprint

    3E:7E:CC:47:AE:D0:20:16:56:F7:1B:48:51:90:16:05:6F:8C:2D:10...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=UTF-8
    date
    Thu, 23 Apr 2026 13:11:11 GMT
    server
    nginx
    via
    1.1 dbce95cfea7b1c6844697c831d524fb6.cloudfront.net (CloudFr...
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    bas-ac-uk.mail.protection.outlook.com

    Domain Information

    bas.ac.uk

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Civic Cookie Control

    Cookie Consent Banner
    Civic Cookie Control
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Civic Cookie Control
    Privacy policy page linked

    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.
    A
    83/100
    Mobile Friendly1 breakpoint
    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, viewport-fit=cover
    1 recommendation
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    Work Sans

    WCAG Partial
    77/100
    Readability
    /30
    21/30

    18px · LH 1.40

    Hierarchy
    /20
    20/20

    4.56x ratio · ✓ H1→H6

    WCAG
    /25
    18/25

    1:1 min contrast

    Performance
    /25
    18/25

    1 font · 4 req

    Heading Font

    Work Sans

    Sans82px

    Body Font

    Work Sans

    Sans18px

    Contrast Ratio

    1:1

    4 issues

    Reading Comfort

    ~36 CPL

    Narrow lines
    82px
    h1
    30px
    h2
    30px
    h3
    18px
    p

    ✅ Excellent readability: 18px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 29/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 4 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 4.6x larger than body text.

    Buy on MyFontsFluid Type (rem)Flesch 29

    Color Palette

    9 unique colors
    3.84:1 AA Large Light
    #dcdddf
    Other· 5.6%
    #746975
    Other· 4.2%
    #0b0c0c
    Primary· 0%
    #635871
    Secondary· 41.99999999999999%
    #393a4c
    Secondary· 19.6%
    #003b5b
    Primary· 12.7%
    #201f2f
    Secondary· 4.5%
    #524b5b
    Secondary· 3.6%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    14 Resources

    8
    Scripts
    6
    Styles
    2
    Async
    0
    Defer

    Top Script Sources

    bas.ac.uk(5)googletagmanager.com(2)cc.cdn.civiccomputing.com(1)

    Website Identity

    British Antarctic Survey

    British Antarctic Survey

    Organization

    Uncovering the secrets of Earth's polar and frozen regions - from the depths of the oceans to the inner edge of space.

    www.bas.ac.uk/
    Location detected: 🇬🇧 United Kingdomvia tld
    📧 Microsoft 365en-US

    Sponsored

    Last analyzed: 23 Apr 2026 at 13:11

    Historical Analysis & Change Tracking