Transport for Wales 421D54
View line Transport for Wales
Alerts for train 421D54
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Transport for Wales.
The mini-map returns when the train runs
On-time · 30 days
63%
19/30 runs under 3 min
RT coverage: 30 full · 0 partial · 0 no data
On-time · 90 days
80%
72/90 runs under 3 min
RT coverage: 90 full · 0 partial · 0 no data
Typical delay
−1min
Median at arrival, 90 days
30 days: +1 min
P90
+6min
9 in 10 runs arrive with less than this
30 days: +8 min
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3–10 min
- 10–30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Mon 7 Sept Max en route +110 min · last fix heading to 40031 +110 min
- Wed 14 Oct Max en route +29 min · last fix heading to Penmaenmawr +29 min
- Sat 15 Aug Max en route +22 min · last fix heading to 40031 +18 min
- Wed 30 Sept Max en route +15 min · last fix heading to 40031 +15 min
- Thu 24 Sept Max en route +16 min · last fix heading to Holyhead +11 min
Distribution · 90 days
90 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 41% · 37
- On time 39% · 35
- 3–10 min 14% · 13
- 10–30 min 4% · 4
- 30+ min 1% · 1
On-time by weekday
- 85% M n=13
- 100% T n=13
- 77% W n=13
- 67% T n=12
- 85% F n=13
- 92% S n=13
- 54% S n=13
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Wed 21 Oct | Penmaenmawr 08:28 | +6 min | +9 min |
| Tue 20 Oct | Holyhead 08:21 | −1 min | +1 min |
| Mon 19 Oct | Penmaenmawr 08:24 | +1 min | +2 min |
| Sun 18 Oct | — 00:10 | +3 min | +3 min |
| Sat 17 Oct | Bangor (Gwynedd) 08:19 | −2 min | +1 min |
| Fri 16 Oct | Holyhead 16:41 | +2 min | +6 min |
| Thu 15 Oct | Holyhead 08:27 | +6 min | +6 min |
| Wed 14 Oct | Penmaenmawr 08:49 | +29 min | +29 min |
| Tue 13 Oct | Holyhead 08:21 | 0 min | +5 min |
| Mon 12 Oct | Holyhead 08:22 | +1 min | +4 min |
| Sun 11 Oct | — 00:11 | +5 min | +5 min |
| Sat 10 Oct | Holyhead 08:22 | +1 min | +6 min |
| Fri 9 Oct | Holyhead 08:16 | −5 min | +2 min |
| Thu 8 Oct | Bangor (Gwynedd) 08:20 | −1 min | +7 min |
| Wed 7 Oct | Bangor (Gwynedd) 08:19 | −2 min | +1 min |
| Tue 6 Oct | Holyhead 08:19 | −2 min | +1 min |
| Mon 5 Oct | 40031 08:19 | −2 min | +2 min |
| Sun 4 Oct | 42117 00:00 | +1 min | +1 min |
| Sat 3 Oct | Holyhead 08:21 | −3 min | +1 min |
| Fri 2 Oct | Holyhead 08:20 | −1 min | +3 min |
| Thu 1 Oct | Holyhead 08:30 | +8 min | +12 min |
| Wed 30 Sept | 40031 08:40 | +15 min | +15 min |
| Tue 29 Sept | 40031 08:19 | −2 min | +2 min |
| Mon 28 Sept | Holyhead 08:26 | +4 min | +4 min |
| Sun 27 Sept | 42117 00:12 | +6 min | +6 min |
| Sat 26 Sept | 40031 08:18 | −3 min | +1 min |
| Fri 25 Sept | 40031 08:27 | +6 min | +6 min |
| Thu 24 Sept | Holyhead 08:32 | +11 min | +16 min |
| Wed 23 Sept | Holyhead 08:21 | 0 min | +16 min |
| Tue 22 Sept | 40031 08:24 | −1 min | +4 min |
Each run is closed into train_runs (country, train number, service day) from the live positions. Final delay = last delay seen. Partial coverage: the feed stopped before the final stop (last value used, hatched in the chart). No data: a run without any valid delay; counts as neither on time nor late. Data collected since 11 July 2026.