birkscinema.co.uk

https://birkscinema.co.uk/

Ranks Overall #1,798 Built Awesome #1,117

Data from Oct 2, 2026, 11:02 PM UTC 5d old Measured once a week · 7 runs since Aug 20, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This URL redirects to https://birkscinema.co.uk/home.

The site’s front door pointing at the page it serves there — a locale or CMS landing path, not a move. The origin is still the address of the site, so history stays under it rather than forking to a path that depends on where the measurement ran. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Uses Vue 3.5.13Font Awesome

Hosted by Netlify

Lighthouse Scores LAB Simulated

Performance

no change

Accessibility

no change

Best Practices

no change

SEO

no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-02 → 2026-09-29), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	41.40 s poor	↑ +1594 ms (+4%) 38.04 s – 43.23 s	5.68 s poor	60.2% 6.3% 33.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	845 ms poor	36.3% 27% 36.7%
CLS CWV Cumulative Layout Shift	0.474 poor	↓ -0.001 (-0.2%) 0.349 – 0.480	0.460 poor	41.1% 9.9% 49%
TBT Total Blocking Time	6.58 s poor	↓ -2526 ms (-27.7%) significant 5.85 s – 9.10 s	n/a	—
FCP First Contentful Paint	9.33 s poor	↓ -6 ms (-0.1%) 8.10 s – 9.50 s	1.30 s good	83.7% 7.8% 8.5%
Speed Index	20.52 s poor	↓ -1197 ms (-5.5%) 20.07 s – 21.72 s	n/a	—
TTFB Time to First Byte	626 ms good	↓ -7 ms (-1.1%) 604 ms – 655 ms	492 ms good	86.7% 7.4% 5.9%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

41.40 s poor

↑ +1594 ms (+4%) 38.04 s – 43.23 s

5.68 s poor

60.2% 6.3% 33.5%

INP CWV Interaction to Next Paint — field only, no lab run can measure it

n/a

—

845 ms poor

36.3% 27% 36.7%

CLS CWV Cumulative Layout Shift

0.474 poor

↓ -0.001 (-0.2%) 0.349 – 0.480

0.460 poor

41.1% 9.9% 49%

TBT Total Blocking Time

6.58 s poor

↓ -2526 ms (-27.7%) significant 5.85 s – 9.10 s

n/a

—

FCP First Contentful Paint

9.33 s poor

↓ -6 ms (-0.1%) 8.10 s – 9.50 s

1.30 s good

83.7% 7.8% 8.5%

Speed Index

20.52 s poor

↓ -1197 ms (-5.5%) 20.07 s – 21.72 s

n/a

—

TTFB Time to First Byte

626 ms good

↓ -7 ms (-1.1%) 604 ms – 655 ms

492 ms good

86.7% 7.4% 5.9%

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

resource load delay 4.59 s

element render delay 139 ms

time to first byte 28 ms

resource load duration 28 ms

LCP LAB Simulated vs LCP FIELD

Lab 41.40 s

Field p75 5.68 s

The lab LCP is 7.28× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	9.89 MB	↑ +1760.7 kB (+22.3%) 8.09 MB – 10.69 MB
Requests	137	↑ +3 (+2.2%) 125 – 137
Third-party Weight	5.35 MB	↑ +1749.1 kB (+50.4%) 3.56 MB – 6.43 MB
Third-party CPU	185 ms	↓ -33 ms (-15.2%) 107 ms – 218 ms
Unused JS	2.77 MB	↑ +10.1 kB (+0.4%) 2.49 MB – 2.77 MB
Unused CSS	193 kB	↑ +133 B (+0.1%) 191 kB – 193 kB

Metric

Value

Change / range

Trend

Page Weight

9.89 MB

↑ +1760.7 kB (+22.3%) 8.09 MB – 10.69 MB

Requests

137

↑ +3 (+2.2%) 125 – 137

Third-party Weight

5.35 MB

↑ +1749.1 kB (+50.4%) 3.56 MB – 6.43 MB

Third-party CPU

185 ms

↓ -33 ms (-15.2%) 107 ms – 218 ms

Unused JS

2.77 MB

↑ +10.1 kB (+0.4%) 2.49 MB – 2.77 MB

Unused CSS

193 kB

↑ +133 B (+0.1%) 191 kB – 193 kB

By resource type

Type	Share	Size	Requests
image	50.7%	5.01 MB	31
script	37.7%	3.73 MB	49
font	7.7%	758 kB	5
other	2.5%	243 kB	29
stylesheet	1.4%	142 kB	21
document	<0.1%	2.5 kB	1
Total		9.89 MB	137

Third parties 8 entities

Entity	Transfer	Size	Main thread Simulated
imgix	image	5.02 MB	0 ms
Accessibe Accessibility Overlay		245 kB	93 ms
Google Fonts		27.3 kB	0 ms
Cookie-Script.com		26.3 kB	73 ms
Rollbar		25.3 kB	17 ms
All 8		5.35 MB	185 ms

Entity

Transfer

Size

Main thread Simulated

imgix

image

5.02 MB

0 ms

Accessibe Accessibility Overlay

245 kB

93 ms

Google Fonts

27.3 kB

0 ms

Cookie-Script.com

26.3 kB

73 ms

Rollbar

25.3 kB

17 ms

All 8

5.35 MB

185 ms

Page health

Metric	Value	Change / range
Main Thread Work	21.46 s	↓ -4216 ms (-16.4%) significant 19.91 s – 25.68 s
Long Tasks	20	→ no change 20 – 20
DOM Elements	1,437	↓ -16 (-1.1%) 1,437 – 1,597
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	7	→ no change 4 – 8
A11y Failures	4	→ no change 4 – 4
A11y Failing Nodes	14	↓ -2 (-12.5%) 12 – 20

Metric

Value

Change / range

Trend

Main Thread Work

21.46 s

↓ -4216 ms (-16.4%) significant 19.91 s – 25.68 s

Long Tasks

→ no change 20 – 20

DOM Elements

1,437

↓ -16 (-1.1%) 1,437 – 1,597

Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)

→ no change 4 – 8

A11y Failures

→ no change 4 – 4

A11y Failing Nodes

↓ -2 (-12.5%) 12 – 20

Main thread work

Task	Share	Duration Simulated
script evaluation	71%	15.15 s
other	12%	2.60 s
script parse compile	6%	1.30 s
style layout	5%	1.02 s
garbage collection	3%	751 ms
paint composite render	3%	578 ms
parse HTML	0%	62 ms
Total		21.46 s

Task

Time

Duration Simulated

script evaluation

71%

15.15 s

other

12%

2.60 s

script parse compile

1.30 s

style layout

1.02 s

garbage collection

751 ms

paint composite render

578 ms

parse HTML

62 ms

Total

21.46 s

Axe violations axe-core 4.13.0, full rule set

7 violating nodes across 5 rules, 2469 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 3 nodes

Offending elements

h3

<h3 data-v-333d86b0="" class="text-uppercase text-h6 text-left q-my-xs" style="color: rgb(119, 119, 119); padding-left: 4px; padding-right: 4px;"><span data-v-333d86b0="" class="text-primary">Today</…

.q-tab__label

<div class="q-tab__label">Privacy Policy</div>

#cookiescript_readmore

<a id="cookiescript_readmore" data-cs-i18n-text="{"en":"Privacy Policy"}" data-cs-i18n-url="{"en":"https:\/\/tickets.birkscinema.co.uk\/privacy-policy"}" target="_blank" aria-label="Privacy Policy, o…

moderate heading-order — Heading levels should only increase by one 1 node

Offending element

.self-center.text-primary[data-v-0212b8ce=""] > h4

<h4 data-v-0212b8ce="" class="col-auto q-my-none row items-center text-current-color text-center text-h4 q-pl-md q-pr-md" style="max-width: 80%;">Coming Soon </h4>

moderate landmark-no-duplicate-contentinfo — Document should not have more than one contentinfo landmark 1 node
Offending element
1. footer[data-test-id="global-widget-footer"]
```
<footer data-v-64882f80="" data-test-id="global-widget-footer" class="" style="background-color: rgb(255, 255, 255);">
```
moderate landmark-unique — Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 1 node
Offending element
1. footer[data-test-id="global-widget-footer"]
```
<footer data-v-64882f80="" data-test-id="global-widget-footer" class="" style="background-color: rgb(255, 255, 255);">
```

moderate meta-viewport — Zooming and scaling must not be disabled 1 node

Offending element

meta[name="viewport"]

<meta name="viewport" content="user-scalable=no,initial-scale=1,maximum-scale=1,minimum-scale=1,width=device-width,viewport-fit=cover">

Accessibility failures 4 of 36 audits

label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 9 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

Best Practices failures 2 of 20 audits

errors-in-console — Browser errors were logged to the console 1 item
valid-source-maps — Missing source maps for large first-party JavaScript 3 items

SEO failures 1 of 10 audits

link-text — Links do not have descriptive text 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 1 console error

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	CLS	FCP	TTFB
2026-09-26	5.60 s	807 ms	0.450	1.32 s	496 ms
2026-09-19	5.65 s	842 ms	0.440	1.31 s	499 ms
2026-09-12	5.78 s	852 ms	0.440	1.36 s	507 ms
2026-09-05	6.32 s	842 ms	0.450	1.45 s	549 ms
2026-08-29	6.40 s	959 ms	0.440	1.54 s	565 ms
2026-08-22	6.00 s	962 ms	0.430	1.62 s	605 ms
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

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-26

5.60 s

807 ms

0.450

1.32 s

496 ms

2026-09-19

5.65 s

842 ms

0.440

1.31 s

499 ms

2026-09-12

5.78 s

852 ms

0.440

1.36 s

507 ms

2026-09-05

6.32 s

842 ms

0.450

1.45 s

549 ms

2026-08-29

6.40 s

959 ms

0.440

1.54 s

565 ms

2026-08-22

6.00 s

962 ms

0.430

1.62 s

605 ms

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

1.17 s

713 ms

2026-07-18

1.18 s

71 ms

1.13 s

760 ms

2026-07-11

1.13 s

71 ms

1.07 s

737 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 2, 2026, 11:02 PM UTC	5	41.40 s	0.474	6.58 s	9.89 MB	3/3	±6	2,762 +11%	79.5s	Wayback
Sep 25, 2026, 11:22 AM UTC	5	39.80 s	0.475	9.10 s	8.09 MB	3/3	±8	2,492 0%	88s	Wayback
Sep 18, 2026, 8:54 AM UTC	5	43.23 s	0.480	5.85 s	10.24 MB	3/3	±4	2,975 +20%	78.5s	Wayback
Sep 11, 2026, 8:44 AM UTC	5	38.54 s	0.476	8.10 s	9.72 MB	3/3	±5	2,406 -3%	89.4s	Wayback
Sep 4, 2026, 5:49 AM UTC	7	41.59 s	0.365	7.07 s	10.28 MB	3/3	±2	2,241 -10%	90.2s	Wayback
Aug 28, 2026, 1:23 AM UTC	5	38.04 s	0.477	7.45 s	9.05 MB	3/3	±6	2,456 -1%	94.4s	Wayback
Aug 20, 2026, 7:07 PM UTC	8	38.30 s	0.349	7.56 s	10.69 MB	3/3	±6	2,487 0%	94.4s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

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Stack

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐇 Unthrottled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 8 entities

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 4 of 36 audits

Best Practices failures 2 of 20 audits

SEO failures 1 of 10 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Embed this score

Lighthouse Scores LAB Simulated

LCP Subparts LAB Unthrottled

LCP LAB Simulated vs LCP FIELD