GWR 831A87
View line GWR
Alerts for train 831A87
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
20%
3/15 runs under 3 min
RT coverage: 15 full · 0 partial · 0 no data
On-time · 90 days
12%
7/58 runs under 3 min
RT coverage: 58 full · 0 partial · 0 no data
Typical delay
+10min
Median at arrival, 90 days
30 days: +8 min
P90
+26min
9 in 10 runs arrive with less than this
30 days: +19 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
- Mon 17 Aug Max en route +40 min · last fix heading to 73251 +39 min
- Fri 14 Aug Max en route +38 min · last fix heading to 73251 +38 min
- Fri 28 Aug Max en route +34 min · last fix heading to 73251 +34 min
- Mon 28 Sept Max en route +34 min · last fix heading to 83398 +33 min
- Mon 24 Aug Max en route +27 min · last fix heading to 73251 +27 min
Distribution · 90 days
58 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 12% · 7
- 3–10 min 38% · 22
- 10–30 min 43% · 25
- 30+ min 7% · 4
On-time by weekday
- 25% M n=12
- 10% T n=10
- 8% W n=12
- 17% T n=12
- 0% F n=12
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 30 Oct | Slough 17:35 | +20 min | +20 min |
| Thu 29 Oct | Maidenhead 17:23 | +8 min | +8 min |
| Wed 28 Oct | Slough 17:25 | +9 min | +9 min |
| Mon 26 Oct | Slough 17:31 | +17 min | +17 min |
| Fri 23 Oct | Maidenhead 17:38 | +23 min | +23 min |
| Thu 22 Oct | Maidenhead 17:24 | +9 min | +9 min |
| Wed 21 Oct | Maidenhead 17:22 | +7 min | +7 min |
| Tue 20 Oct | Slough 17:32 | +17 min | +18 min |
| Mon 19 Oct | Maidenhead 17:15 | 0 min | +3 min |
| Fri 9 Oct | Maidenhead 17:19 | +4 min | +4 min |
| Thu 8 Oct | Slough 17:16 | +1 min | +3 min |
| Wed 7 Oct | Slough 17:19 | +4 min | +4 min |
| Tue 6 Oct | Slough 17:18 | +3 min | +3 min |
| Mon 5 Oct | Slough 17:17 | +2 min | +4 min |
| Fri 2 Oct | 73251 17:26 | +11 min | +12 min |
| Thu 1 Oct | 73251 17:20 | +5 min | +5 min |
| Wed 30 Sept | 73251 17:24 | +8 min | +9 min |
| Tue 29 Sept | Torquay 17:17 | +2 min | +2 min |
| Mon 28 Sept | 83398 15:21 | +33 min | +34 min |
| Fri 25 Sept | 73251 17:28 | +12 min | +12 min |
| Thu 24 Sept | 73251 17:23 | +8 min | +8 min |
| Wed 23 Sept | 73251 17:16 | +1 min | +3 min |
| Tue 22 Sept | 73251 17:18 | +3 min | +3 min |
| Mon 21 Sept | 73251 17:28 | +13 min | +13 min |
| Fri 18 Sept | 73251 17:33 | +18 min | +18 min |
| Thu 17 Sept | 73251 17:25 | +10 min | +10 min |
| Wed 16 Sept | 73251 17:20 | +5 min | +5 min |
| Tue 15 Sept | 73251 17:23 | +8 min | +9 min |
| Mon 14 Sept | 83398 14:49 | +1 min | +2 min |
| Fri 11 Sept | 73251 17:21 | +6 min | +7 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.