GWR 811A23
View line GWR
Alerts for train 811A23
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
40%
10/25 runs under 3 min
RT coverage: 25 full · 0 partial · 0 no data
On-time · 90 days
40%
29/73 runs under 3 min
RT coverage: 73 full · 0 partial · 0 no data
Typical delay
+4min
Median at arrival, 90 days
30 days: +4 min
P90
+16min
9 in 10 runs arrive with less than this
30 days: +16 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
- Wed 14 Oct Max en route +36 min · last fix heading to Slough +36 min
- Sat 26 Sept Max en route +23 min · last fix heading to 73251 +23 min
- Fri 23 Oct Max en route +17 min · last fix heading to Slough +17 min
- Fri 14 Aug Max en route +17 min · last fix heading to 73251 +17 min
- Tue 6 Oct Max en route +19 min · last fix heading to Slough +16 min
Distribution · 90 days
73 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 3% · 2
- On time 37% · 27
- 3–10 min 41% · 30
- 10–30 min 18% · 13
- 30+ min 1% · 1
On-time by weekday
- 69% M n=13
- 50% T n=12
- 46% W n=13
- 25% T n=12
- 31% F n=13
- 10% S n=10
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Wed 28 Oct | Slough 15:47 | 0 min | — |
| Mon 26 Oct | Slough 15:51 | +4 min | +4 min |
| Sat 24 Oct | Slough 15:59 | +15 min | +15 min |
| Fri 23 Oct | Slough 16:04 | +17 min | +17 min |
| Thu 22 Oct | Maidenhead 15:53 | +6 min | +6 min |
| Wed 21 Oct | Maidenhead 15:48 | +1 min | +5 min |
| Tue 20 Oct | Slough 15:52 | +4 min | +5 min |
| Mon 19 Oct | Slough 15:44 | −3 min | +2 min |
| Sat 17 Oct | Maidenhead 15:46 | +3 min | +5 min |
| Fri 16 Oct | Slough 15:48 | 0 min | +6 min |
| Thu 15 Oct | Maidenhead 15:57 | +11 min | +11 min |
| Wed 14 Oct | Slough 16:23 | +36 min | +36 min |
| Tue 13 Oct | Slough 15:48 | +1 min | +3 min |
| Mon 12 Oct | Maidenhead 15:45 | −2 min | +6 min |
| Sat 10 Oct | Slough 15:50 | +7 min | +7 min |
| Fri 9 Oct | Slough 15:53 | +6 min | +9 min |
| Thu 8 Oct | Slough 15:51 | +4 min | +7 min |
| Wed 7 Oct | Slough 16:02 | +15 min | +15 min |
| Tue 6 Oct | Slough 16:03 | +16 min | +19 min |
| Mon 5 Oct | Maidenhead 15:48 | +2 min | +9 min |
| Sat 3 Oct | 73251 15:45 | +2 min | +2 min |
| Fri 2 Oct | 73251 15:47 | +3 min | +5 min |
| Thu 1 Oct | 73251 15:46 | +2 min | +2 min |
| Wed 30 Sept | 73251 15:53 | +9 min | +9 min |
| Tue 29 Sept | 73251 15:43 | −1 min | +3 min |
| Mon 28 Sept | 73251 16:00 | +16 min | +18 min |
| Sat 26 Sept | 73251 16:06 | +23 min | +23 min |
| Fri 25 Sept | 73251 15:58 | +14 min | +14 min |
| Thu 24 Sept | 73251 15:52 | +8 min | +8 min |
| Wed 23 Sept | 74331 15:21 | +16 min | +16 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.