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
35%
9/26 runs under 3 min
RT coverage: 26 full · 0 partial · 0 no data
On-time · 90 days
39%
29/74 runs under 3 min
RT coverage: 74 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +5 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
- Sat 25 Jul Max en route +21 min · last fix heading to 73251 +21 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
74 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 1% · 1
- On time 38% · 28
- 3–10 min 43% · 32
- 10–30 min 16% · 12
- 30+ min 1% · 1
On-time by weekday
- 62% M n=13
- 46% T n=13
- 38% W n=13
- 38% T n=13
- 31% F n=13
- 11% S n=9
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| 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 |
| Tue 22 Sept | 73251 15:45 | +1 min | +3 min |
| Mon 21 Sept | 73251 15:44 | 0 min | +3 min |
| Sat 19 Sept | 73251 15:48 | +5 min | +8 min |
| Fri 18 Sept | 73251 15:48 | +4 min | +6 min |
| Thu 17 Sept | 73251 15:49 | +5 min | +5 min |
| Wed 16 Sept | 73251 15:50 | +6 min | +6 min |
| Tue 15 Sept | 73251 15:54 | +10 min | +10 min |
| Mon 14 Sept | 73251 15:46 | +2 min | +2 min |
| Fri 11 Sept | 73251 15:49 | +5 min | +5 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.