GWR 811A30
View line GWR
Alerts for train 811A30
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%
6/17 runs under 3 min
RT coverage: 17 full · 0 partial · 0 no data
On-time · 90 days
36%
24/66 runs under 3 min
RT coverage: 66 full · 0 partial · 0 no data
Typical delay
+4min
Median at arrival, 90 days
30 days: +4 min
P90
+21min
9 in 10 runs arrive with less than this
30 days: +18 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
- Tue 22 Sept Max en route +56 min · last fix heading to 74331 +56 min
- Mon 10 Aug Max en route +37 min · last fix heading to 73251 +37 min
- Fri 23 Oct Max en route +30 min · last fix heading to Slough +30 min
- Fri 14 Aug Max en route +30 min · last fix heading to 73251 +30 min
- Fri 25 Sept Max en route +25 min · last fix heading to 73251 +25 min
Distribution · 90 days
66 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 36% · 24
- 3–10 min 41% · 27
- 10–30 min 17% · 11
- 30+ min 6% · 4
On-time by weekday
- 30% M n=10
- 64% T n=11
- 36% W n=11
- 36% T n=11
- 36% F n=11
- 17% S n=12
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Thu 29 Oct | Maidenhead 19:24 | +8 min | +12 min |
| Sat 24 Oct | Maidenhead 19:37 | +21 min | +21 min |
| Fri 23 Oct | Slough 19:46 | +30 min | +30 min |
| Thu 22 Oct | Slough 19:22 | +5 min | +6 min |
| Wed 21 Oct | Slough 19:19 | +3 min | +5 min |
| Tue 20 Oct | Maidenhead 19:17 | +1 min | +4 min |
| Mon 19 Oct | Slough 19:24 | +7 min | +7 min |
| Sat 17 Oct | Slough 19:20 | +4 min | +6 min |
| Sat 10 Oct | Slough 19:20 | +4 min | +6 min |
| Fri 9 Oct | Slough 19:16 | 0 min | — |
| Thu 8 Oct | Maidenhead 19:22 | +6 min | +6 min |
| Wed 7 Oct | Slough 19:18 | +2 min | +2 min |
| Tue 6 Oct | Maidenhead 19:17 | +1 min | +4 min |
| Mon 5 Oct | Maidenhead 19:17 | +1 min | +2 min |
| Sat 3 Oct | 73251 19:16 | +1 min | +3 min |
| Fri 2 Oct | 73251 19:32 | +16 min | +16 min |
| Thu 1 Oct | 73251 19:20 | +4 min | +4 min |
| Wed 30 Sept | 73251 19:16 | −1 min | +8 min |
| Tue 29 Sept | 73251 19:17 | 0 min | +4 min |
| Mon 28 Sept | 73251 19:18 | +2 min | +2 min |
| Sat 26 Sept | 73251 19:18 | +3 min | +5 min |
| Fri 25 Sept | 73251 19:41 | +25 min | +25 min |
| Thu 24 Sept | 73251 19:25 | +9 min | +9 min |
| Wed 23 Sept | 73251 19:33 | +17 min | +17 min |
| Tue 22 Sept | 74331 19:14 | +56 min | +56 min |
| Mon 21 Sept | 73251 19:17 | +1 min | +4 min |
| Sat 19 Sept | 73251 19:19 | +4 min | +4 min |
| Fri 18 Sept | 73251 19:18 | +2 min | +3 min |
| Thu 17 Sept | 73251 19:15 | −1 min | +2 min |
| Wed 16 Sept | 73251 19:19 | +3 min | +9 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.