GWR 851A78
View line GWR
Alerts for train 851A78
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
46%
11/24 runs under 3 min
RT coverage: 24 full · 0 partial · 0 no data
On-time · 90 days
36%
27/76 runs under 3 min
RT coverage: 76 full · 0 partial · 0 no data
Typical delay
+8min
Median at arrival, 90 days
30 days: +4 min
P90
+35min
9 in 10 runs arrive with less than this
30 days: +37 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 27 Jul Max en route +74 min · last fix heading to 74233 +69 min
- Wed 29 Jul Max en route +68 min · last fix heading to 84135 +66 min
- Thu 8 Oct Max en route +48 min · last fix heading to Theale +48 min
- Wed 7 Oct Max en route +47 min · last fix heading to Theale +47 min
- Mon 14 Sept Max en route +42 min · last fix heading to 73251 +42 min
Distribution · 90 days
76 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 4% · 3
- On time 32% · 24
- 3–10 min 21% · 16
- 10–30 min 29% · 22
- 30+ min 14% · 11
On-time by weekday
- 33% M n=12
- 33% T n=12
- 23% W n=13
- 46% T n=13
- 38% F n=13
- 38% S n=13
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 10 Oct | Slough 13:09 | +2 min | +3 min |
| Fri 9 Oct | Slough 12:37 | −1 min | +7 min |
| Thu 8 Oct | Theale 12:55 | +48 min | +48 min |
| Wed 7 Oct | Theale 12:56 | +47 min | +47 min |
| Tue 6 Oct | Slough 12:40 | +4 min | +12 min |
| Mon 5 Oct | Maidenhead 12:36 | +2 min | +7 min |
| Sat 3 Oct | 73251 12:37 | 0 min | +9 min |
| Fri 2 Oct | 73251 12:47 | +10 min | +14 min |
| Thu 1 Oct | 73251 12:36 | −2 min | +5 min |
| Wed 30 Sept | 73251 12:41 | +4 min | +4 min |
| Tue 29 Sept | 73251 12:39 | +2 min | +5 min |
| Mon 28 Sept | 73251 12:45 | +8 min | +10 min |
| Sat 26 Sept | 73251 12:45 | +8 min | +9 min |
| Fri 25 Sept | 73251 12:44 | +7 min | +13 min |
| Thu 24 Sept | 73251 12:36 | −1 min | +5 min |
| Wed 23 Sept | 73251 12:43 | +5 min | +11 min |
| Tue 22 Sept | 73251 12:38 | +1 min | +8 min |
| Mon 21 Sept | 73251 12:41 | +4 min | +13 min |
| Sat 19 Sept | 73251 12:36 | −2 min | +4 min |
| Fri 18 Sept | 73251 13:02 | +25 min | +33 min |
| Thu 17 Sept | 73251 12:31 | −1 min | +3 min |
| Wed 16 Sept | 73251 12:38 | +1 min | +8 min |
| Tue 15 Sept | 73251 13:04 | +27 min | +30 min |
| Mon 14 Sept | 73251 13:20 | +42 min | +42 min |
| Sat 12 Sept | 73251 12:53 | +8 min | +10 min |
| Fri 11 Sept | 73251 12:37 | 0 min | +7 min |
| Thu 10 Sept | 73251 12:51 | +14 min | +14 min |
| Wed 9 Sept | 73251 13:02 | +24 min | +29 min |
| Tue 8 Sept | 73251 12:38 | +1 min | +7 min |
| Mon 7 Sept | 73251 13:05 | +28 min | +29 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.