nationalrail.co.uk/live-trains/departures/birmingham-new-street
https://www.nationalrail.co.uk/live-trains/departures/birmingham-new-street
Ranks Overall #7 National Rail #3
Data from Oct 30, 2026, 10:21 PM UTC old Measured once a day · 1 run since Oct 30, 2026
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Wayback Machine
https://www.nationalrail.co.uk/live-trains/departures/birmingham-new-street/.
The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. 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
Filmstrip LAB Throttled
How the page drew during the measured load, at 9 points across 16.56 s. Compare this filmstrip against another site.
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2.07 s
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3.71 s
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6.21 s
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8.28 s
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10.35 s
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12.42 s
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14.49 s
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15.56 s
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16.56 s
Lighthouse Scores LAB Simulated
Metrics LAB FIELD
Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-10-01 → 2026-10-28), origin-level.
| Metric | Lab Simulated | Field | |||
|---|---|---|---|---|---|
| Value | Change / range | Trend | p75 | Distribution | |
| LCP CWV Largest Contentful Paint | 16.91 s poor | — 16.91 s – 16.91 s | 2.32 s good | 77.1% 11% 11.9% | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | 540 ms poor | 33.4% 38.9% 27.6% | |
| CLS CWV Cumulative Layout Shift | 0.373 poor | — 0.373 – 0.373 | 0.180 needs work | 50.6% 30.2% 19.2% | |
| TBT Total Blocking Time | 1.45 s poor | — 1.45 s – 1.45 s | n/a | — | |
| FCP First Contentful Paint | 1.11 s good | — 1.11 s – 1.11 s | 1.52 s good | 81% 10.6% 8.4% | |
| Speed Index | 5.17 s needs work | — 5.17 s – 5.17 s | n/a | — | |
| TTFB Time to First Byte | 485 ms good | — 485 ms – 485 ms | 955 ms needs work | 68.8% 21.4% 9.8% | |
LCP Subparts LAB Throttled
The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.
LCP LAB Simulated vs LCP FIELD
The lab LCP is 7.29× the field p75 — real users likely have above-average hardware or network connectivity.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 2.87 MB | — 2.87 MB – 2.87 MB | |
| Requests | 96 | — 96 – 96 | |
| Third-party Weight | 1.35 MB | — 1.35 MB – 1.35 MB | |
| Third-party CPU | 194 ms | — 194 ms – 194 ms | |
| Unused JS | 1.04 MB | — 1.04 MB – 1.04 MB | |
| Unused CSS | 12.5 kB | — 12.5 kB – 12.5 kB |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| script | 68.4% | 1.96 MB | 48 | |
| font | 15.8% | 453 kB | 7 | |
| other | 10.4% | 298 kB | 30 | |
| image | 3.5% | 99.3 kB | 7 | |
| document | 1.5% | 42.1 kB | 1 | |
| stylesheet | 0.5% | 15.0 kB | 1 | |
| Total | 2.87 MB | 96 |
Third parties 8 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Optanon | 347 kB | 23 ms | |
| Google/Doubleclick Ads | 285 kB | 28 ms | |
| intergient.com | 250 kB | 31 ms | |
| Google Tag Manager | 198 kB | 41 ms | |
| confiant-integrations.net | 169 kB | 44 ms | |
| All 8 | 1.35 MB | 194 ms |
Without JavaScript
The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.
47.9% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 3.91 s | — 3.91 s – 3.91 s | |
| Long Tasks | 18 | — 18 – 18 | |
| DOM Elements | 931 | — 931 – 931 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 1 | — 1 – 1 | |
| A11y Failures | 1 | — 1 – 1 | |
| A11y Failing Nodes | 21 | — 21 – 21 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| script evaluation | 65% | 2.56 s | |
| other | 13% | 504 ms | |
| script parse compile | 12% | 475 ms | |
| garbage collection | 4% | 175 ms | |
| style layout | 3% | 118 ms | |
| parse HTML | 1% | 45 ms | |
| paint composite render | 1% | 40 ms | |
| Total | 3.91 s |
Axe violations axe-core 4.13.0, full rule set
1 violating node across 1 rule, 1835 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
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moderate
region— All page content should be contained by landmarks 1 nodeOffending element
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#onetrust-consent-sdk<div id="onetrust-consent-sdk" data-nosnippet="true">
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Accessibility failures 1 of 32 audits
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label-content-name-mismatch— Elements with visible text labels do not have matching accessible names. 21 nodes
Best Practices failures 4 of 19 audits
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third-party-cookies— Uses third-party cookies 1 item -
errors-in-console— Browser errors were logged to the console 1 item -
inspector-issues— Issues were logged in the `Issues` panel in Chrome Devtools 2 items -
valid-source-maps— Missing source maps for large first-party JavaScript 1 item
Hygiene
Measurement log
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 30, 2026, 10:21 PM UTC | 27 | 16.91 s | 0.373 | 1.45 s | 2.87 MB | 3/3 | ±6 | 2,089 +1% | 81.6s |
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