birkscinema.co.uk
Data from Aug 20, 2026, 7:07 PM UTC 3d old
Built Awesome #1,135 · 1 measurement · since Aug 20, 2026
https://birkscinema.co.uk/home.
Lighthouse follows the redirect, so the numbers below describe the destination page, not this one. Not yet confirmed as a move; it needs to lead to the same place on several consecutive runs first.
Stack
Detected on the same page load as the accessibility pass — the generator
from <meta name="generator"> or the shape of the page,
the host from response headers.
Core Web Vitals field data, url-level
Real Chrome users, 28-day window (2026-07-22 → 2026-08-18). This is what Google measures you on.
Scores
Lab metrics Lighthouse, mobile
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| LCP Largest Contentful Paint | 38.30 s | — | — | 38.30 s | 38.30 s | |
| CLS Cumulative Layout Shift | 0.349 | — | — | 0.349 | 0.349 | |
| TBT Total Blocking Time | 7.56 s | — | — | 7.56 s | 7.56 s | |
| FCP First Contentful Paint | 8.26 s | — | — | 8.26 s | 8.26 s | |
| Speed Index | 21.72 s | — | — | 21.72 s | 21.72 s | |
| TTFB Time to First Byte | 604 ms | — | — | 604 ms | 604 ms |
What LCP is made of observed, unthrottled
A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.
Measured on the trace before throttling is modelled, so these are real durations that will not sum to the 38.30 s above — that figure is a simulation of the same load on a slow phone and connection. Read these for the proportions: which phase dominates.
Field data Chrome UX Report, url-level
Real Chrome users, 28-day trailing window (2026-07-22 → 2026-08-18). This is what Google measures you on.
| Metric | p75 | Rating | Distribution (good / needs work / poor) |
|---|---|---|---|
| LCP CWV | 5.70 s | poor | 56.7% good |
| INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run | 946 ms | poor | 33.6% good |
| CLS CWV | 0.430 | poor | 39.6% good |
| FCP | 1.58 s | good | 78.7% good |
| TTFB | 597 ms | good | 82% good |
Lab vs field
Lab LCP 38.30 s · field p75 5.70 s · real users are 0.15× faster than the lab.
Field history 25 weeks
Weekly p75 from the CrUX History API, backfilled in a single request.
| Week ending | LCP | INP | CLS | FCP | TTFB |
|---|---|---|---|---|---|
| 2026-08-15 | 5.27 s | 939 ms | 0.420 | 1.55 s | 608 ms |
| 2026-08-08 | 3.95 s | 781 ms | 0.400 | 1.43 s | 630 ms |
| 2026-08-01 | 2.28 s | 445 ms | 0.290 | 1.30 s | 678 ms |
| 2026-07-25 | 1.42 s | 119 ms | 0 | 1.17 s | 713 ms |
| 2026-07-18 | 1.18 s | 71 ms | 0 | 1.13 s | 760 ms |
| 2026-07-11 | 1.13 s | 71 ms | 0 | 1.07 s | 737 ms |
| 2026-07-04 | 1.14 s | 72 ms | 0 | 1.08 s | 776 ms |
| 2026-06-27 | 1.09 s | 70 ms | 0 | 1.05 s | 771 ms |
| 2026-06-20 | 1.13 s | 70 ms | 0 | 1.06 s | 756 ms |
| 2026-06-13 | 1.16 s | 71 ms | 0 | 1.09 s | 746 ms |
| 2026-06-06 | 1.15 s | 70 ms | 0 | 1.07 s | 700 ms |
| 2026-05-30 | 1.16 s | 70 ms | 0 | 1.11 s | 700 ms |
Page weight
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Page Weight | 10.69 MB | — | — | 10.69 MB | 10.69 MB | |
| Requests | 125 | — | — | 125 | 125 | |
| Third-party Weight | 6.43 MB | — | — | 6.43 MB | 6.43 MB | |
| Third-party CPU | 169 ms | — | — | 169 ms | 169 ms | |
| Unused JS | 2.50 MB | — | — | 2.50 MB | 2.50 MB | |
| Unused CSS | 191 kB | — | — | 191 kB | 191 kB |
By resource type
Third parties 8 entities
6.43 MB transferred, 169 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.
Page health
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Main Thread Work | 23.18 s | — | — | 23.18 s | 23.18 s | |
| Long Tasks | 20 | — | — | 20 | 20 | |
| DOM Elements | 1,486 | — | — | 1,486 | 1,486 | |
| Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset | 4 | — | — | 4 | 4 | |
| A11y Failures | 4 | — | — | 4 | 4 | |
| A11y Failing Nodes | 12 | — | — | 12 | 12 |
Main thread work
Axe violations axe-core 4.13.0, full rule set
4 violating nodes across 3 rules, 3559 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.
-
serious
color-contrast— Elements must meet minimum color contrast ratio thresholds 2 nodes -
moderate
heading-order— Heading levels should only increase by one 1 node -
moderate
meta-viewport— Zooming and scaling must not be disabled 1 node
Accessibility failures 4 of 36 audits
Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.
-
label-content-name-mismatch— Elements with visible text labels do not have matching accessible names. 7 nodes -
color-contrast— Background and foreground colors do not have a sufficient contrast ratio. 3 nodes -
heading-order— Heading elements are not in a sequentially-descending order 1 node -
meta-viewport— `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. 1 node
Hygiene
Changes rarely — which is exactly why a change is worth noticing.
Measurement log
Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.
| When | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took |
|---|---|---|---|---|---|---|---|---|---|
| Aug 20, 2026, 7:07 PM UTC | 8 | 38.30 s | 0.349 | 7.56 s | 10.69 MB | 3/3 | ±6 | 2,487 | 94.4s |
Embed this score
Live below, then the markup that produces it. Drop that on any page to show
birkscinema.co.uk's scores, updated whenever this instance
re-measures — more about the component. Don’t forget to bundle the speedlify2-score.js component code into your site!
<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://birkscinema.co.uk/"></speedlify2-score>