GWR 811A01
View line GWR
Alerts for train 811A01
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
58%
14/24 runs under 3 min
RT coverage: 24 full · 0 partial · 0 no data
On-time · 90 days
63%
48/76 runs under 3 min
RT coverage: 76 full · 0 partial · 0 no data
Typical delay
+1min
Median at arrival, 90 days
30 days: +2 min
P90
+16min
9 in 10 runs arrive with less than this
30 days: +12 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
- Thu 10 Sept Max en route +32 min · last fix heading to 73251 +32 min
- Wed 23 Sept Max en route +25 min · last fix heading to 73251 +25 min
- Thu 20 Aug Max en route +25 min · last fix heading to 73251 +25 min
- Tue 15 Sept Max en route +21 min · last fix heading to 73251 +21 min
- Sat 19 Sept Max en route +22 min · last fix heading to 73251 +20 min
Distribution · 90 days
76 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 63% · 48
- 3–10 min 16% · 12
- 10–30 min 20% · 15
- 30+ min 1% · 1
On-time by weekday
- 83% M n=12
- 75% T n=12
- 54% W n=13
- 62% T n=13
- 46% F n=13
- 62% S n=13
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 24 Oct | Slough 07:23 | +10 min | +12 min |
| Fri 23 Oct | Maidenhead 07:04 | −1 min | — |
| Thu 22 Oct | Maidenhead 07:09 | +3 min | +3 min |
| Wed 21 Oct | Slough 07:21 | +16 min | +16 min |
| Tue 20 Oct | Maidenhead 07:04 | −1 min | — |
| Mon 19 Oct | Maidenhead 07:07 | +2 min | +2 min |
| Sat 17 Oct | Slough 07:13 | 0 min | +1 min |
| Fri 16 Oct | Maidenhead 07:04 | −1 min | +1 min |
| Thu 15 Oct | Maidenhead 07:16 | +10 min | +10 min |
| Wed 14 Oct | Maidenhead 07:05 | 0 min | — |
| Tue 13 Oct | Maidenhead 07:06 | 0 min | +1 min |
| Mon 12 Oct | Maidenhead 07:10 | +5 min | +5 min |
| Sat 10 Oct | Slough 07:13 | 0 min | +1 min |
| Fri 9 Oct | Maidenhead 07:05 | 0 min | — |
| Thu 8 Oct | Maidenhead 07:04 | −1 min | — |
| Wed 7 Oct | Slough 07:24 | +19 min | +19 min |
| Tue 6 Oct | Slough 07:07 | +2 min | +6 min |
| Mon 5 Oct | 73251 07:05 | 0 min | +2 min |
| Sat 3 Oct | 73251 07:14 | +1 min | +2 min |
| Fri 2 Oct | 73251 07:12 | +7 min | +7 min |
| Thu 1 Oct | 73251 07:07 | +2 min | +3 min |
| Wed 30 Sept | 73799 10:58 | +13 min | +15 min |
| Tue 29 Sept | 73251 07:08 | +3 min | +3 min |
| Mon 28 Sept | 73251 07:08 | +3 min | +4 min |
| Sat 26 Sept | 73251 07:14 | 0 min | +1 min |
| Fri 25 Sept | 73251 07:08 | +3 min | +4 min |
| Thu 24 Sept | 73251 07:05 | 0 min | +1 min |
| Wed 23 Sept | 73251 07:30 | +25 min | +25 min |
| Tue 22 Sept | 73251 07:05 | 0 min | +2 min |
| Mon 21 Sept | 73251 07:07 | 0 min | +1 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.