GWR 811A25
View line GWR
Alerts for train 811A25
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line GWR.
The mini-map returns when the train runs
On-time · 30 days
52%
15/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
45%
35/78 runs under 3 min
RT coverage: 78 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +2 min
P90
+15min
9 in 10 runs arrive with less than this
30 days: +9 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 10 Aug Max en route +76 min · last fix heading to 73251 +74 min
- Wed 14 Oct Max en route +48 min · last fix heading to Maidenhead +48 min
- Tue 8 Sept Max en route +46 min · last fix heading to 73251 +46 min
- Mon 3 Aug Max en route +46 min · last fix heading to 74233 +44 min
- Sat 17 Oct Max en route +23 min · last fix heading to Maidenhead +23 min
Distribution · 90 days
78 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 1% · 1
- On time 44% · 34
- 3–10 min 38% · 30
- 10–30 min 12% · 9
- 30+ min 5% · 4
On-time by weekday
- 46% M n=13
- 33% T n=12
- 55% W n=11
- 46% T n=13
- 46% F n=13
- 60% S n=5
- 36% S n=11
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 19 Oct | Slough 16:47 | +1 min | +10 min |
| Sun 18 Oct | Slough 18:21 | +11 min | +12 min |
| Sat 17 Oct | Maidenhead 17:08 | +23 min | +23 min |
| Fri 16 Oct | Maidenhead 16:51 | +1 min | +1 min |
| Thu 15 Oct | Slough 16:52 | +2 min | +2 min |
| Wed 14 Oct | Maidenhead 17:38 | +48 min | +48 min |
| Tue 13 Oct | Slough 16:58 | +8 min | +8 min |
| Mon 12 Oct | Maidenhead 16:58 | +6 min | +7 min |
| Sun 11 Oct | Slough 18:10 | +3 min | +3 min |
| Sat 10 Oct | Maidenhead 16:46 | +1 min | +5 min |
| Fri 9 Oct | Slough 16:48 | +2 min | +3 min |
| Thu 8 Oct | Maidenhead 16:48 | +2 min | +4 min |
| Wed 7 Oct | Maidenhead 16:47 | +1 min | +1 min |
| Tue 6 Oct | Maidenhead 16:45 | −1 min | +2 min |
| Mon 5 Oct | Slough 16:48 | +2 min | +2 min |
| Sun 4 Oct | 73251 18:16 | +1 min | +5 min |
| Sat 3 Oct | 73251 16:47 | +1 min | +4 min |
| Fri 2 Oct | 73251 16:51 | +6 min | +6 min |
| Thu 1 Oct | 73251 16:48 | +3 min | +3 min |
| Wed 30 Sept | 73251 16:47 | +2 min | +7 min |
| Tue 29 Sept | 73251 16:45 | 0 min | +1 min |
| Mon 28 Sept | 73251 16:45 | 0 min | +2 min |
| Sun 27 Sept | 73251 18:27 | +8 min | +8 min |
| Sat 26 Sept | 73251 16:46 | +1 min | +2 min |
| Fri 25 Sept | 73251 16:53 | +8 min | +8 min |
| Thu 24 Sept | 73251 16:51 | +6 min | +6 min |
| Wed 23 Sept | 74331 16:13 | +7 min | +7 min |
| Tue 22 Sept | 73251 16:48 | +3 min | +3 min |
| Mon 21 Sept | 73251 16:48 | +3 min | +3 min |
| Sat 19 Sept | 73251 16:52 | +6 min | +12 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.