GWR 831A77
View line GWR
Alerts for train 831A77
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
0%
0/8 runs under 3 min
RT coverage: 8 full · 0 partial · 0 no data
On-time · 90 days
4%
1/23 runs under 3 min
RT coverage: 23 full · 0 partial · 0 no data
Typical delay
+9min
Median at arrival, 90 days
30 days: +7 min
P90
+24min
9 in 10 runs arrive with less than this
30 days: +28 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
- Sun 11 Oct Max en route +41 min · last fix heading to Slough +41 min
- Sat 5 Sept Max en route +35 min · last fix heading to 74233 +33 min
- Sun 16 Aug Max en route +26 min · last fix heading to 73251 +24 min
- Sat 17 Oct Max en route +22 min · last fix heading to Maidenhead +22 min
- Sat 15 Aug Max en route +21 min · last fix heading to 73251 +17 min
Distribution · 90 days
23 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 4% · 1
- On time 0% · 0
- 3–10 min 48% · 11
- 10–30 min 39% · 9
- 30+ min 9% · 2
On-time by weekday
- — M n=0
- — T n=0
- — W n=0
- — T n=0
- — F n=0
- 0% S n=11
- 8% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 24 Oct | Slough 12:30 | +12 min | +12 min |
| Sun 18 Oct | Maidenhead 11:17 | +8 min | +8 min |
| Sat 17 Oct | Maidenhead 12:39 | +22 min | +22 min |
| Sun 11 Oct | Slough 11:54 | +41 min | +41 min |
| Sun 4 Oct | 73251 11:12 | +5 min | +6 min |
| Sat 3 Oct | 73251 12:19 | +3 min | +5 min |
| Sun 27 Sept | 73251 11:23 | +4 min | +9 min |
| Sat 26 Sept | 73251 12:24 | +6 min | +7 min |
| Sun 20 Sept | 73251 11:28 | +13 min | +13 min |
| Sat 19 Sept | 73251 12:26 | +9 min | +9 min |
| Sun 13 Sept | 73251 11:19 | +4 min | +4 min |
| Sat 12 Sept | 73251 12:36 | +13 min | +14 min |
| Sun 6 Sept | 73251 11:22 | +8 min | +8 min |
| Sat 5 Sept | 74233 12:25 | +33 min | +35 min |
| Sun 30 Aug | 73251 11:14 | +7 min | +8 min |
| Sat 29 Aug | 73251 12:22 | +5 min | +7 min |
| Sun 23 Aug | 73251 11:14 | +7 min | +9 min |
| Sat 22 Aug | 73251 12:28 | +11 min | +12 min |
| Sun 16 Aug | 73251 11:31 | +24 min | +26 min |
| Sat 15 Aug | 73251 12:35 | +17 min | +21 min |
| Sun 9 Aug | 73251 11:18 | +11 min | +11 min |
| Sat 8 Aug | 73251 12:31 | +13 min | +14 min |
| Sun 2 Aug | 73251 11:14 | −4 min | +5 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.