GWR 851A39
View line GWR
Alerts for train 851A39
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
60%
15/25 runs under 3 min
RT coverage: 25 full · 0 partial · 0 no data
On-time · 90 days
51%
38/74 runs under 3 min
RT coverage: 74 full · 0 partial · 1 no data
Typical delay
+1min
Median at arrival, 90 days
30 days: 0 min
P90
+50min
9 in 10 runs arrive with less than this
30 days: +21 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
- Tue 29 Sept Max en route +118 min · last fix heading to Slough +93 min
- Sat 12 Sept Max en route +117 min · last fix heading to Maidenhead +85 min
- Sun 13 Sept Max en route +87 min · last fix heading to 73251 +78 min
- Sat 19 Sept Max en route +61 min · last fix heading to 73251 +59 min
- Thu 27 Aug Max en route +64 min · last fix heading to 73251 +56 min
Distribution · 90 days
74 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 38% · 28
- On time 14% · 10
- 3–10 min 18% · 13
- 10–30 min 15% · 11
- 30+ min 16% · 12
On-time by weekday
- 46% M n=13
- 54% T n=13
- 55% W n=11
- 82% T n=11
- 69% F n=13
- 8% S n=12
- 0% S n=1
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Tue 20 Oct | Slough 00:02 | −5 min | +1 min |
| Mon 19 Oct | Slough 00:00 | −8 min | +3 min |
| Sat 17 Oct | Slough 23:50 | 0 min | +5 min |
| Fri 16 Oct | Slough 00:04 | −3 min | +15 min |
| Thu 15 Oct | Slough 23:59 | −8 min | +5 min |
| Wed 14 Oct | Slough 23:57 | −10 min | +22 min |
| Tue 13 Oct | Slough 00:04 | −4 min | +3 min |
| Mon 12 Oct | Slough 00:12 | +5 min | +25 min |
| Sat 10 Oct | Goring & Streatley 23:52 | +3 min | +6 min |
| Fri 9 Oct | Maidenhead 23:46 | −21 min | +9 min |
| Thu 8 Oct | Slough 00:04 | −3 min | +4 min |
| Wed 7 Oct | Slough 00:03 | −4 min | +6 min |
| Tue 6 Oct | Slough 00:12 | +5 min | +10 min |
| Mon 5 Oct | Slough 00:04 | −3 min | +2 min |
| Sat 3 Oct | 83010 22:47 | +13 min | +13 min |
| Fri 2 Oct | 73251 00:15 | +8 min | +28 min |
| Thu 1 Oct | 73251 00:07 | 0 min | +4 min |
| Wed 30 Sept | 73251 00:08 | +1 min | +93 min |
| Tue 29 Sept | Slough 00:59 | +93 min | +118 min |
| Mon 28 Sept | 73251 00:12 | +4 min | +9 min |
| Sat 26 Sept | 73251 00:17 | +29 min | +29 min |
| Fri 25 Sept | 73251 00:01 | −6 min | +15 min |
| Thu 24 Sept | 73251 00:07 | −1 min | +26 min |
| Wed 23 Sept | 73251 00:23 | +26 min | +32 min |
| Tue 22 Sept | 81690 22:10 | +7 min | +7 min |
| Mon 21 Sept | 73251 00:23 | +26 min | +34 min |
| Sat 19 Sept | 73251 00:59 | +59 min | +61 min |
| Fri 18 Sept | 81690 00:41 | 0 min | +3 min |
| Thu 17 Sept | 73251 00:06 | −1 min | +9 min |
| Wed 16 Sept | 73251 00:11 | +4 min | +10 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.