Transport for Wales 421D18
View line Transport for Wales
Alerts for train 421D18
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
75%
3/4 runs under 3 min
RT coverage: 4 full · 0 partial · 0 no data
On-time · 90 days
57%
8/14 runs under 3 min
RT coverage: 14 full · 0 partial · 0 no data
Typical delay
+1min
Median at arrival, 90 days
P90
+22min
9 in 10 runs arrive with less than this
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
- Sun 4 Oct Max en route +35 min · last fix heading to Holyhead +27 min
- Sun 2 Aug Max en route +37 min · last fix heading to 40031 +26 min
- Sun 23 Aug Max en route +14 min · last fix heading to 40031 +11 min
- Sun 16 Aug Max en route +15 min · last fix heading to Holyhead +8 min
- Sun 30 Aug Max en route +10 min · last fix heading to Holyhead +7 min
Distribution · 90 days
14 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 36% · 5
- On time 21% · 3
- 3–10 min 21% · 3
- 10–30 min 21% · 3
- 30+ min 0% · 0
On-time by weekday
- — M n=0
- — T n=0
- 0% W n=1
- — T n=0
- — F n=0
- — S n=0
- 62% S n=13
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 18 Oct | Conwy 16:48 | −4 min | +5 min |
| Sun 11 Oct | Bangor (Gwynedd) 16:49 | −4 min | +5 min |
| Sun 4 Oct | Holyhead 17:19 | +27 min | +35 min |
| Sun 27 Sept | Holyhead 16:53 | −2 min | +8 min |
| Sun 20 Sept | 40028 16:49 | −3 min | +3 min |
| Wed 16 Sept | — 10:36 | +4 min | +5 min |
| Sun 13 Sept | 40031 16:56 | +2 min | +5 min |
| Sun 6 Sept | 40028 17:34 | 0 min | +3 min |
| Sun 30 Aug | Holyhead 17:00 | +7 min | +10 min |
| Sun 23 Aug | 40031 17:03 | +11 min | +14 min |
| Sun 16 Aug | Holyhead 17:00 | +8 min | +15 min |
| Sun 9 Aug | 40028 16:49 | −3 min | +3 min |
| Sun 2 Aug | 40031 17:20 | +26 min | +37 min |
| Sun 26 Jul | Holyhead 16:52 | 0 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.