We keep the look intact. We optimise code, assets, and loading order so the site feels faster without a redesign.
Optimising for the metrics Google uses
Stop guessing. Optimise Core Web Vitals based on real user behaviour.
Move beyond Lighthouse scores and achieve stable Core Web Vitals pass rates by optimising for how users actually experience your site.
Before-and-after performance, measured on live traffic
“Our site went from sluggish to fast — and our CWV pass rate finally stuck.”
Plain-English explainer
Core Web Vitals Overview
The core metrics behind Google’s page experience signals.
Loading
LCP: Largest Contentful Paint
Measures how fast the main content shows up.
Google loading thresholds
When this threshold is met, users perceive the page as fast and ready.
User impact: Users are more likely to stay when the main content appears quickly.
Common causes:
- Large, unoptimised images
- Slow server response times
- Render-blocking CSS or fonts
Interactivity
INP: Interaction to Next Paint
Measures how fast the site reacts to a click or tap.
Google interactivity thresholds
When this threshold is exceeded, interactions feel noticeably laggy.
User impact: Delays after interaction make a site feel broken or unresponsive.
Common causes:
- Heavy JavaScript on the main thread
- Long tasks blocking input
- Too many third-party tags
Stability
CLS: Cumulative Layout Shift
Measures how stable the layout stays while loading.
Google stability thresholds
When this threshold is exceeded, layout shifts become disruptive.
User impact: Unexpected layout shifts lead to misclicks and frustration.
Common causes:
- Images without set sizes
- Ads or embeds loading late
- Fonts swapping after render
Questions about Core Web Vitals?
If you’re unsure where to start or what your scores really mean, a call with our experts can help clarify next steps.
What we do
Services built for wins you can measure
Targeted performance improvements designed to deliver measurable results.
CWV Audit & Roadmap
A clear, ranked plan to fix what slows users down.
LCP Speed Optimisation
Faster loading for key pages that drive revenue.
INP / JavaScript Optimisation
Responsive interactions without jank or delay.
CLS & Layout Stability Fixes
Calm layouts that build confidence and trust.
CMS / Theme Optimisation
Clean themes and templates that stay fast at scale.
Monitoring & Reporting
Monthly progress, real-user data, and action updates.
Who we work with:
How it works
A focused process with steady results
We keep you informed at every step, with clear deliverables and simple next actions.
01
Measure & diagnose
Core Web Vitals benchmarks and real-user data to pinpoint LCP, INP, and CLS issues.
02
Plan & safeguard
Prioritised fixes with staging checks and rollback plans to protect uptime and revenue.
03
Implement & validate
Focused optimisations for speed, interactivity, and stability, verified with lab and real-user data.
04
Monitor & iterate
Continuous CWV tracking, regression alerts, and refinements as traffic and content change.
Pricing
Choose the level of support you need
Clear Core Web Vitals improvements, scoped to your site and growth stage.
Starter
£2,400
Best for teams that want fast CWV wins and a clear plan.
- Audit and optimisation for key pages
- Image, font, and critical CSS tuning
- Caching and CDN configuration
- Third-party scripts and analytics clean-up
Growth
£4,800
For dynamic or high-traffic sites.
- Everything in Starter
- JavaScript delivery optimisation
- Layout and interaction stability fixes
- Staging checks and monitoring
Bespoke
Custom
For teams that need long-term performance at scale.
- Architecture and delivery review
- Performance checks in CI/CD
- Ongoing monitoring and alerts
- Continuous optimisation
Real World Results
Measured improvements, real outcomes
Measured gains across Core Web Vitals and conversion paths.
SaaS onboarding
Optimised above-the-fold assets and rendering paths, cutting LCP in half on the trial flow.
LCP
Key improvements:
- Optimised hero assets, fonts, and critical CSS on signup pages
- Removed render-blocking scripts during initial load
- Prioritised above-the-fold content for first interaction
+18% conversions
Ecommerce catalog
Stabilised layouts by reserving space for dynamic content across product grids and ads.
CLS
Key improvements:
- Reserved space for images, ads, and dynamic UI elements
- Normalised product card heights across breakpoints
- Prevented late-loading content from shifting layout
+11% add-to-cart
Publisher landing pages
Reduced JavaScript overhead and long tasks to improve interaction responsiveness.
INP
Key improvements:
- Reduced long main-thread tasks from third-party scripts
- Deferred non-critical JavaScript and embeds
- Improved tap and scroll responsiveness on mobile
+9% lead rate
FAQ
Questions we hear often
Short answers now, detailed answers on the call.
Most audits take 1 week. Fixes can run 2 to 6 weeks depending on scope and platform.
Yes. Google uses them as part of page experience. Better CWV means fewer ranking risks and stronger visibility.
We work with WordPress, Shopify, Webflow, custom React or Vue apps, and most modern CMS stacks.
We track Core Web Vitals, conversion lift, and engagement changes, with a clear before/after report.
Ready to improve real-world performance?
Let’s review your Core Web Vitals and identify the highest-impact improvements for your site.
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