GWR 851A87
View line GWR
Alerts for train 851A87
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.
It does not run today
Last recorded run: Sunday 1 November +2 min
The mini-map returns when the train runs
On-time · 30 days
50%
2/4 runs under 3 min
RT coverage: 4 full · 0 partial · 0 no data
On-time · 90 days
17%
2/12 runs under 3 min
RT coverage: 12 full · 0 partial · 0 no data
Typical delay
+14min
Median at arrival, 90 days
P90
+23min
9 in 10 runs arrive with less than this
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
- Sun 23 Aug Max en route +30 min · last fix heading to 73251 +27 min
- Sun 13 Sept Max en route +23 min · last fix heading to 73251 +23 min
- Sun 25 Oct Max en route +22 min · last fix heading to Maidenhead +22 min
- Sun 6 Sept Max en route +21 min · last fix heading to 73251 +21 min
- Sun 20 Sept Max en route +18 min · last fix heading to 73251 +17 min
Distribution · 90 days
12 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 17% · 2
- 3–10 min 8% · 1
- 10–30 min 75% · 9
- 30+ min 0% · 0
On-time by weekday
- — M n=0
- — T n=0
- — W n=0
- — T n=0
- — F n=0
- — S n=0
- 17% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 1 Nov | Maidenhead 17:29 | +2 min | +2 min |
| Sun 25 Oct | Maidenhead 17:59 | +22 min | +22 min |
| Sun 18 Oct | Slough 17:48 | +11 min | +18 min |
| Sun 11 Oct | Slough 18:03 | +1 min | +5 min |
| Sun 4 Oct | 73251 17:37 | +6 min | +6 min |
| Sun 27 Sept | 73251 18:34 | +12 min | +12 min |
| Sun 20 Sept | 73251 17:49 | +17 min | +18 min |
| Sun 13 Sept | 73251 17:55 | +23 min | +23 min |
| Sun 6 Sept | 73251 17:53 | +21 min | +21 min |
| Sun 30 Aug | 73251 17:46 | +14 min | +14 min |
| Sun 23 Aug | 73251 17:59 | +27 min | +30 min |
| Sun 16 Aug | 73251 17:45 | +14 min | +14 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.