GWR 771L21
View line GWR
Alerts for train 771L21
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
40%
8/20 runs under 3 min
RT coverage: 20 full · 0 partial · 0 no data
On-time · 90 days
49%
22/45 runs under 3 min
RT coverage: 45 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +5 min
P90
+20min
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 14 Oct Max en route +69 min · last fix heading to Maidenhead +69 min
- Tue 6 Oct Max en route +28 min · last fix heading to Slough +25 min
- Thu 13 Aug Max en route +23 min · last fix heading to 73251 +23 min
- Thu 20 Aug Max en route +22 min · last fix heading to 73251 +22 min
- Mon 17 Aug Max en route +23 min · last fix heading to 73251 +22 min
Distribution · 90 days
45 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% · 1
- On time 47% · 21
- 3–10 min 27% · 12
- 10–30 min 22% · 10
- 30+ min 2% · 1
On-time by weekday
- 70% M n=10
- 50% T n=8
- 25% W n=8
- 50% T n=10
- 44% F n=9
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 19 Oct | Maidenhead 15:51 | −1 min | +5 min |
| Fri 16 Oct | Slough 15:53 | 0 min | +4 min |
| Thu 15 Oct | Slough 16:04 | +12 min | +12 min |
| Wed 14 Oct | Maidenhead 17:01 | +69 min | +69 min |
| Tue 13 Oct | Maidenhead 16:09 | +18 min | +21 min |
| Mon 12 Oct | Maidenhead 16:03 | +11 min | +11 min |
| Fri 9 Oct | Slough 16:01 | +9 min | +10 min |
| Thu 8 Oct | Slough 15:53 | +1 min | +4 min |
| Wed 7 Oct | Maidenhead 16:06 | +14 min | +14 min |
| Tue 6 Oct | Slough 16:17 | +25 min | +28 min |
| Mon 5 Oct | Patchway 15:48 | +1 min | +6 min |
| Fri 2 Oct | 73251 15:52 | 0 min | +2 min |
| Thu 1 Oct | 73251 15:51 | −1 min | +1 min |
| Wed 30 Sept | 73251 15:56 | +4 min | +4 min |
| Tue 29 Sept | 73251 15:57 | +5 min | +8 min |
| Mon 28 Sept | 73251 16:06 | +13 min | +14 min |
| Fri 25 Sept | 73251 16:02 | +9 min | +9 min |
| Thu 24 Sept | 73251 15:57 | +5 min | +5 min |
| Tue 22 Sept | 73251 15:52 | 0 min | +4 min |
| Mon 21 Sept | 73251 15:52 | 0 min | +4 min |
| Fri 18 Sept | 73251 15:57 | +5 min | +5 min |
| Thu 17 Sept | 73251 15:53 | +1 min | +1 min |
| Wed 16 Sept | 73251 16:06 | +14 min | +14 min |
| Tue 15 Sept | 73251 15:57 | +5 min | +6 min |
| Fri 11 Sept | 73251 15:55 | +3 min | +7 min |
| Thu 10 Sept | 73251 15:52 | 0 min | +2 min |
| Wed 9 Sept | 73251 15:52 | −1 min | +6 min |
| Tue 8 Sept | 73251 15:50 | −1 min | +2 min |
| Mon 7 Sept | 73251 15:55 | +2 min | +4 min |
| Fri 4 Sept | 73251 15:54 | +2 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.