GWR 811A15
View line GWR
Alerts for train 811A15
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
39%
11/28 runs under 3 min
RT coverage: 28 full · 0 partial · 0 no data
On-time · 90 days
34%
29/85 runs under 3 min
RT coverage: 85 full · 0 partial · 0 no data
Typical delay
+5min
Median at arrival, 90 days
30 days: +5 min
P90
+23min
9 in 10 runs arrive with less than this
30 days: +13 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 14 Sept Max en route +92 min · last fix heading to 73251 +92 min
- Sun 30 Aug Max en route +48 min · last fix heading to 73251 +48 min
- Sun 9 Aug Max en route +51 min · last fix heading to 73251 +48 min
- Mon 12 Oct Max en route +39 min · last fix heading to Slough +39 min
- Mon 7 Sept Max en route +37 min · last fix heading to 73251 +37 min
Distribution · 90 days
85 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 34% · 29
- 3–10 min 36% · 31
- 10–30 min 22% · 19
- 30+ min 7% · 6
On-time by weekday
- 31% M n=13
- 42% T n=12
- 42% W n=12
- 27% T n=11
- 46% F n=13
- 50% S n=12
- 0% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Tue 13 Oct | Maidenhead 11:46 | +2 min | +3 min |
| Mon 12 Oct | Slough 12:22 | +39 min | +39 min |
| Sun 11 Oct | Slough 13:48 | +5 min | +5 min |
| Sat 10 Oct | Slough 11:49 | +2 min | +4 min |
| Fri 9 Oct | Slough 11:42 | 0 min | +4 min |
| Thu 8 Oct | Maidenhead 11:42 | 0 min | +1 min |
| Wed 7 Oct | Maidenhead 11:44 | +2 min | +2 min |
| Mon 5 Oct | 73799 11:42 | −1 min | +2 min |
| Sun 4 Oct | 73251 13:50 | +6 min | +8 min |
| Sat 3 Oct | 73251 11:47 | +2 min | +2 min |
| Fri 2 Oct | 73251 11:49 | +7 min | +10 min |
| Thu 1 Oct | 73251 11:55 | +12 min | +12 min |
| Wed 30 Sept | 73251 11:45 | +3 min | +5 min |
| Tue 29 Sept | 73251 11:48 | +6 min | +6 min |
| Mon 28 Sept | 73251 11:48 | +6 min | +6 min |
| Sun 27 Sept | 73251 13:59 | +10 min | +10 min |
| Sat 26 Sept | 73251 11:56 | +11 min | +12 min |
| Fri 25 Sept | 73251 11:48 | +4 min | +9 min |
| Thu 24 Sept | 73251 11:44 | +1 min | +3 min |
| Wed 23 Sept | 74331 11:15 | +10 min | +10 min |
| Tue 22 Sept | 73251 11:42 | 0 min | +2 min |
| Mon 21 Sept | 73251 11:44 | +1 min | +3 min |
| Sun 20 Sept | 73251 14:14 | +23 min | +23 min |
| Sat 19 Sept | 73251 11:47 | +2 min | +2 min |
| Fri 18 Sept | 73251 11:47 | +5 min | +5 min |
| Thu 17 Sept | 73251 11:47 | +5 min | +9 min |
| Wed 16 Sept | 73251 11:58 | +16 min | +16 min |
| Tue 15 Sept | 73251 11:48 | +6 min | +6 min |
| Mon 14 Sept | 73251 13:14 | +92 min | +92 min |
| Fri 11 Sept | 73251 11:43 | 0 min | +2 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.