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bigyellow.co.uk

https://bigyellow.co.uk· First analyzed 15 May 2026· Updated 15 May 2026
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bigyellow.co.uk
Desktop screenshot of bigyellow.co.uk
Mobile screenshot of bigyellow.co.uk
Mobile

Sponsored

Hosting Provider

Incapsula Inc

IP Address

45.223.18.249

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇺🇸 New York, United States

ASN

AS19551

Organization

Incapsula Inc

Nameservers

dns1.safenames.com.dns3.safenames.org.dns2.safenames.net.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
752 ms10%
Speed Index
978 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.6 MB
46 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Incapsula Inc

Technology Stack

10 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Microsoft Clarity

CSS Frameworks

2
Bootstrap
Tailwind CSS

Fonts

2
Adobe Fonts (Typekit)Adobe Fonts

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Reviews

1
Trustpilot

SEO Analysis

C69/100
19
5
0
Meta Tags15/15
Content11/12
Headings8/8
Technical15/21
E-E-A-T0/7
Images6/7
Links2/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
B
bigyellow.co.ukbigyellow.co.uk

Self Storage Units in London and UK | Big Yellow Storage

Secure self storage units for home & business across London & the UK. Clear pricing online, a wide range of storage units & convenient access when you need it.

Title Length56 chars

Recommended: 50-60 chars (~334px / 580px)

Description Length159 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    19/100
    Poor
    5 11 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D45/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    0/25
    Citation
    11/25

    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:6%
    Words:638
    Token eff.:Optimal
    Sections/1K:36.1
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary85w
    Descriptive Headingsavg 5.1w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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
    80/100
    12
    Passed
    1
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    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
    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
    9/15
    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...
    Upgrade to view recommendations

    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.
    27/100
    E
    324 mg
    CO₂e / view
    2.6 MB
    Page Weight
    30%
    Cleaner Than
    New Visitor
    370 mg
    vs
    Returning (cached)
    185 mg
    Annual (10K/mo)
    38.8 kg
    Emission Segments
    Data Center
    72 mg
    Network
    78 mg
    Device
    174 mg
    Resource Breakdown
    JavaScript
    386.1 KB
    Images
    515.2 KB
    CSS
    1.7 MB
    HTML
    11.9 KB
    Other
    890 B
    Green Hosting Not Verified
    Incapsula Inc
    7 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    41%Poor
    Interactive

    HTTPS

    WAF

    57d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    Valid From

    11.07.2025

    Valid Until

    11.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    www.bigyellow.co.ukbigyellow.co.uk

    SHA-256 Fingerprint

    AB:89:91:A2:71:D8:0C:CD:DC:66:CB:CD:2D:9D:57:45:1A:87:D9:C0...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache, no-store)
    content-length
    4664
    content-type
    text/html
    strict-transport-security
    max-age=31536000
    x-iinfo
    52-306827991-0 pNNN RT(1778860569721 105) q(0 -1 -1 1) r(0 -...
    Good Warning Issue

    Email Infrastructure

    Mimecast

    Score

    75

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (2)

    eu-smtp-inbound-1.mimecast.com
    eu-smtp-inbound-2.mimecast.com

    Domain Information

    bigyellow.co.uk

    DNSSEC
    Not Enabled

    Privacy & Compliance

    OneTrust

    Cookie Consent Banner
    OneTrust
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: OneTrust
    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.
    B
    77/100
    Mobile Friendly3 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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    objektiv-variable + Roboto

    WCAG Partial
    76/100
    Readability
    /30
    25/30

    16px · LH 1.75

    Hierarchy
    /20
    17/20

    4.5x ratio · ✓ H1→H6

    WCAG
    /25
    13/25

    1:1 min contrast

    Performance
    /25
    21/25

    System fonts

    Heading Font

    objektiv-variable

    Sans72px

    Body Font

    Roboto

    Sans16px

    Contrast Ratio

    1:1

    4 issues

    Reading Comfort

    ~36 CPL

    Narrow lines
    72px
    h1
    48px
    h2
    58px
    h3
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ⚠️ 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 4.5x larger than body text.

    ❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

    ✅ System fonts: Zero font loading delay — best possible LCP impact.

    AAdobe FontsBuy on MyFontsVariable FontsFlesch 54

    Color Palette

    15 unique colors
    7.75:1 AAA Light
    #eaece9
    Text· 8%
    #434850
    Secondary· 3.4%
    #27343d
    Secondary· 12.8%
    #fcfdff
    Primary· 11%
    #121c2a
    Secondary· 8.7%
    #c6daf1
    Accent· 8.6%
    #92b8e1
    Accent· 8.6%
    #a29082
    Secondary· 8.5%

    Business & Marketing Stack

    4 Tools Detected

    Enterprise

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    OneTrustEnterprise

    Cookie consent and privacy compliance tools

    Reviews & Social Proof

    1
    TrustpilotMid-Market

    Customer reviews and testimonials

    3

    Categories

    4

    Total Tools

    1

    Enterprise

    1

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    20 Resources

    16
    Scripts
    4
    Styles
    7
    Async
    4
    Defer

    Top Script Sources

    local(6)googletagmanager.com(4)cdn-ukwest.onetrust.com(2)cdn-4.convertexperiments.com(1)widget.trustpilot.com(1)

    Website Identity

    bigyellow.co.uk

    0800 783 4949
    Location detected: 🇬🇧 United Kingdomvia tld
    📧 Mimecasten

    Sponsored

    Last analyzed: 15 May 2026 at 15:56

    Historical Analysis & Change Tracking