GWR 831A09
View line GWR
Alerts for train 831A09
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%
7/21 runs under 3 min
RT coverage: 21 full · 0 partial · 0 no data
On-time · 90 days
24%
15/63 runs under 3 min
RT coverage: 63 full · 0 partial · 0 no data
Typical delay
+6min
Median at arrival, 90 days
30 days: +6 min
P90
+15min
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
- Wed 16 Sept Max en route +31 min · last fix heading to 73251 +31 min
- Tue 1 Sept Max en route +27 min · last fix heading to 73251 +27 min
- Tue 4 Aug Max en route +27 min · last fix heading to 73251 +27 min
- Thu 24 Sept Max en route +21 min · last fix heading to 73251 +21 min
- Wed 7 Oct Max en route +19 min · last fix heading to Slough +19 min
Distribution · 90 days
63 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 24% · 15
- 3–10 min 46% · 29
- 10–30 min 29% · 18
- 30+ min 2% · 1
On-time by weekday
- 31% M n=13
- 17% T n=12
- 8% W n=12
- 15% T n=13
- 46% F n=13
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 12 Oct | Maidenhead 09:46 | +4 min | +5 min |
| Fri 9 Oct | Maidenhead 09:44 | +2 min | +3 min |
| Thu 8 Oct | Slough 09:44 | +1 min | +1 min |
| Wed 7 Oct | Slough 10:01 | +19 min | +19 min |
| Tue 6 Oct | Maidenhead 09:50 | +8 min | +8 min |
| Mon 5 Oct | 73251 09:44 | +2 min | +4 min |
| Fri 2 Oct | 73251 09:44 | +1 min | +6 min |
| Thu 1 Oct | 73251 09:46 | +4 min | +4 min |
| Wed 30 Sept | 73251 09:42 | 0 min | +5 min |
| Tue 29 Sept | 73251 09:44 | +2 min | +5 min |
| Mon 28 Sept | 73251 09:51 | +9 min | +9 min |
| Fri 25 Sept | 73251 09:50 | +8 min | +8 min |
| Thu 24 Sept | 73251 10:03 | +21 min | +21 min |
| Wed 23 Sept | 74331 09:13 | +9 min | +9 min |
| Tue 22 Sept | 73251 09:47 | +5 min | +5 min |
| Mon 21 Sept | 73251 09:51 | +8 min | +8 min |
| Fri 18 Sept | 73251 09:44 | +2 min | +8 min |
| Thu 17 Sept | 73251 09:49 | +7 min | +9 min |
| Wed 16 Sept | 73251 10:13 | +31 min | +31 min |
| Tue 15 Sept | 73251 09:49 | +6 min | +6 min |
| Mon 14 Sept | 74233 09:30 | +13 min | +13 min |
| Fri 11 Sept | 73251 09:48 | +6 min | +9 min |
| Thu 10 Sept | 73251 09:47 | +5 min | +6 min |
| Wed 9 Sept | 73251 09:52 | +10 min | +10 min |
| Tue 8 Sept | 73251 09:51 | +9 min | +9 min |
| Mon 7 Sept | 73251 09:57 | +15 min | +15 min |
| Fri 4 Sept | 73251 09:53 | +11 min | +13 min |
| Thu 3 Sept | 73251 09:45 | +3 min | +6 min |
| Wed 2 Sept | 73251 09:52 | +9 min | +9 min |
| Tue 1 Sept | 73251 10:09 | +27 min | +27 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.