GWR 811A31
View line GWR
Alerts for train 811A31
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
33%
10/30 runs under 3 min
RT coverage: 30 full · 0 partial · 0 no data
On-time · 90 days
27%
23/85 runs under 3 min
RT coverage: 85 full · 0 partial · 0 no data
Typical delay
+6min
Median at arrival, 90 days
30 days: +4 min
P90
+22min
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
- Fri 14 Aug Max en route +49 min · last fix heading to 73251 +49 min
- Thu 20 Aug Max en route +39 min · last fix heading to 74233 +39 min
- Wed 29 Jul Max en route +47 min · last fix heading to 73251 +36 min
- Fri 11 Sept Max en route +32 min · last fix heading to 73251 +32 min
- Fri 16 Oct Max en route +27 min · last fix heading to Maidenhead +27 min
Distribution · 90 days
85 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 1% · 1
- On time 26% · 22
- 3–10 min 41% · 35
- 10–30 min 27% · 23
- 30+ min 5% · 4
On-time by weekday
- 17% M n=12
- 50% T n=12
- 15% W n=13
- 8% T n=13
- 38% F n=13
- 30% S n=10
- 33% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 18 Oct | Slough 21:29 | +7 min | +7 min |
| Sat 17 Oct | Maidenhead 19:50 | +5 min | +8 min |
| Fri 16 Oct | Maidenhead 20:12 | +27 min | +27 min |
| Thu 15 Oct | Maidenhead 19:51 | +6 min | +6 min |
| Wed 14 Oct | Maidenhead 19:44 | −1 min | +2 min |
| Tue 13 Oct | Maidenhead 19:44 | −1 min | +4 min |
| Mon 12 Oct | Slough 19:49 | +4 min | +5 min |
| Sun 11 Oct | Slough 21:17 | 0 min | +4 min |
| Sat 10 Oct | Slough 19:42 | −1 min | +2 min |
| Fri 9 Oct | Maidenhead 19:45 | 0 min | +2 min |
| Thu 8 Oct | Slough 20:09 | +24 min | +24 min |
| Wed 7 Oct | Slough 19:48 | +3 min | +4 min |
| Tue 6 Oct | Maidenhead 19:44 | −1 min | +2 min |
| Mon 5 Oct | Slough 19:52 | +7 min | +10 min |
| Sun 4 Oct | 73251 21:22 | +5 min | +5 min |
| Sat 3 Oct | 73251 19:46 | +3 min | +3 min |
| Fri 2 Oct | 73251 19:45 | 0 min | +6 min |
| Thu 1 Oct | 73251 19:49 | +3 min | +5 min |
| Wed 30 Sept | 73251 19:51 | +6 min | +11 min |
| Tue 29 Sept | 73251 19:45 | 0 min | +1 min |
| Mon 28 Sept | 73251 19:53 | +8 min | +10 min |
| Sun 27 Sept | 73251 21:26 | +4 min | +6 min |
| Sat 26 Sept | 73251 19:51 | +8 min | +8 min |
| Fri 25 Sept | 73251 19:59 | +13 min | +13 min |
| Thu 24 Sept | 73251 19:50 | +5 min | +6 min |
| Wed 23 Sept | 74331 19:23 | +18 min | +18 min |
| Tue 22 Sept | 81690 18:05 | −1 min | +1 min |
| Mon 21 Sept | 73251 19:46 | +1 min | +3 min |
| Sun 20 Sept | 73251 21:43 | +20 min | +26 min |
| Sat 19 Sept | 73251 19:47 | +3 min | +4 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.