GWR 811A18
View line GWR
Alerts for train 811A18
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
38%
8/21 runs under 3 min
RT coverage: 21 full · 0 partial · 0 no data
On-time · 90 days
33%
26/78 runs under 3 min
RT coverage: 78 full · 0 partial · 0 no data
Typical delay
+4min
Median at arrival, 90 days
30 days: +3 min
P90
+12min
9 in 10 runs arrive with less than this
30 days: +8 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 23 Sept Max en route +81 min · last fix heading to 73251 +79 min
- Wed 30 Sept Max en route +73 min · last fix heading to 73251 +72 min
- Mon 7 Sept Max en route +31 min · last fix heading to 73251 +30 min
- Wed 19 Aug Max en route +23 min · last fix heading to 73251 +23 min
- Fri 30 Oct Max en route +22 min · last fix heading to Slough +22 min
Distribution · 90 days
78 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 3% · 2
- On time 31% · 24
- 3–10 min 51% · 40
- 10–30 min 12% · 9
- 30+ min 4% · 3
On-time by weekday
- 33% M n=9
- 45% T n=11
- 27% W n=11
- 36% T n=11
- 42% F n=12
- 0% S n=13
- 55% S n=11
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 31 Oct | Maidenhead 13:20 | +5 min | +5 min |
| Fri 30 Oct | Slough 13:37 | +22 min | +22 min |
| Thu 29 Oct | Maidenhead 13:16 | 0 min | +2 min |
| Sun 25 Oct | Maidenhead 14:51 | +3 min | +6 min |
| Sat 24 Oct | Slough 13:25 | +11 min | +11 min |
| Fri 23 Oct | Slough 13:13 | −2 min | +1 min |
| Thu 22 Oct | Slough 13:23 | +8 min | +9 min |
| Wed 21 Oct | Slough 13:16 | +1 min | +3 min |
| Tue 20 Oct | Maidenhead 13:15 | +1 min | +6 min |
| Mon 19 Oct | Maidenhead 13:18 | +3 min | +4 min |
| Sun 18 Oct | Slough 14:50 | +1 min | +8 min |
| Sat 17 Oct | Maidenhead 13:16 | +3 min | +3 min |
| Sun 11 Oct | Slough 14:44 | +1 min | +4 min |
| Sat 10 Oct | Maidenhead 13:22 | +7 min | +7 min |
| Fri 9 Oct | Slough 13:17 | +2 min | +2 min |
| Thu 8 Oct | Slough 13:18 | +3 min | +5 min |
| Wed 7 Oct | Maidenhead 13:17 | +2 min | +5 min |
| Tue 6 Oct | Slough 13:19 | +4 min | +7 min |
| Mon 5 Oct | Slough 13:18 | +3 min | +8 min |
| Sun 4 Oct | 73251 14:52 | +6 min | +7 min |
| Sat 3 Oct | 73251 13:16 | +3 min | +3 min |
| Fri 2 Oct | 73251 13:17 | +2 min | +4 min |
| Thu 1 Oct | 73251 13:24 | +9 min | +9 min |
| Wed 30 Sept | 73251 13:40 | +72 min | +73 min |
| Tue 29 Sept | 73251 13:17 | +2 min | +2 min |
| Mon 28 Sept | 73251 13:17 | +2 min | +3 min |
| Sun 27 Sept | 73251 14:54 | +5 min | +5 min |
| Sat 26 Sept | 73251 13:26 | +13 min | +13 min |
| Fri 25 Sept | 73251 13:20 | +5 min | +6 min |
| Thu 24 Sept | 73251 13:16 | +1 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.