GWR 831A12
View line GWR
Alerts for train 831A12
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
21%
3/14 runs under 3 min
RT coverage: 14 full · 0 partial · 0 no data
On-time · 90 days
32%
18/56 runs under 3 min
RT coverage: 56 full · 0 partial · 0 no data
Typical delay
+5min
Median at arrival, 90 days
30 days: +7 min
P90
+20min
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
- Wed 16 Sept Max en route +34 min · last fix heading to 73251 +34 min
- Fri 14 Aug Max en route +28 min · last fix heading to 73251 +28 min
- Thu 13 Aug Max en route +22 min · last fix heading to 73251 +22 min
- Tue 20 Oct Max en route +21 min · last fix heading to Slough +21 min
- Thu 27 Aug Max en route +21 min · last fix heading to 73251 +21 min
Distribution · 90 days
56 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 32% · 18
- 3–10 min 41% · 23
- 10–30 min 25% · 14
- 30+ min 2% · 1
On-time by weekday
- 36% M n=11
- 36% T n=11
- 45% W n=11
- 8% T n=12
- 36% F n=11
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Thu 5 Nov | Slough 10:04 | −1 min | +6 min |
| Wed 4 Nov | Slough 10:08 | +1 min | +2 min |
| Tue 3 Nov | Slough 10:22 | +16 min | +16 min |
| Mon 2 Nov | Slough 10:17 | +12 min | +12 min |
| Fri 30 Oct | Slough 10:17 | +4 min | +9 min |
| Thu 29 Oct | Slough 10:21 | +7 min | +7 min |
| Fri 23 Oct | Slough 10:33 | +19 min | +23 min |
| Thu 22 Oct | Slough 10:28 | +14 min | +14 min |
| Wed 21 Oct | Maidenhead 10:16 | +2 min | +6 min |
| Tue 20 Oct | Slough 10:35 | +21 min | +21 min |
| Mon 19 Oct | Slough 10:20 | +7 min | +7 min |
| Fri 9 Oct | Slough 10:18 | +4 min | +4 min |
| Thu 8 Oct | Slough 10:17 | +3 min | +7 min |
| Wed 7 Oct | Slough 10:22 | +8 min | +8 min |
| Tue 6 Oct | Slough 10:19 | +6 min | +7 min |
| Mon 5 Oct | 73251 10:14 | 0 min | +9 min |
| Fri 2 Oct | 73251 10:14 | 0 min | +4 min |
| Thu 1 Oct | 73251 10:29 | +15 min | +15 min |
| Wed 30 Sept | 73799 12:01 | +12 min | +12 min |
| Tue 29 Sept | 73251 10:13 | −1 min | +7 min |
| Mon 28 Sept | 73251 10:19 | +5 min | +10 min |
| Fri 25 Sept | 73251 10:17 | +3 min | +4 min |
| Thu 24 Sept | 73251 10:24 | +9 min | +12 min |
| Wed 23 Sept | 73251 10:34 | +20 min | +22 min |
| Tue 22 Sept | 73251 10:14 | 0 min | +7 min |
| Mon 21 Sept | 73251 10:29 | +14 min | +14 min |
| Fri 18 Sept | 73251 10:16 | +2 min | +2 min |
| Thu 17 Sept | 73251 10:18 | +4 min | +5 min |
| Wed 16 Sept | 73251 10:48 | +34 min | +34 min |
| Tue 15 Sept | 73251 10:19 | +5 min | +6 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.