South Western Railway 871A51
View line South Western Railway
Alerts for train 871A51
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line South Western Railway.
The mini-map returns when the train runs
On-time · 30 days
72%
18/25 runs under 3 min
RT coverage: 25 full · 0 partial · 0 no data
On-time · 90 days
51%
43/84 runs under 3 min
RT coverage: 84 full · 0 partial · 0 no data
Typical delay
+2min
Median at arrival, 90 days
30 days: +1 min
P90
+21min
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
- Fri 7 Aug Max en route +79 min · last fix heading to 86912 +79 min
- Sat 8 Aug Max en route +69 min · last fix heading to Byfleet & New Haw +69 min
- Wed 23 Sept Max en route +54 min · last fix heading to Alton +54 min
- Sun 16 Aug Max en route +44 min · last fix heading to 87230 +43 min
- Fri 14 Aug Max en route +43 min · last fix heading to Alton +42 min
Distribution · 90 days
84 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 51% · 43
- 3–10 min 33% · 28
- 10–30 min 8% · 7
- 30+ min 7% · 6
On-time by weekday
- 67% M n=12
- 46% T n=13
- 77% W n=13
- 69% T n=13
- 23% F n=13
- 70% S n=10
- 0% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 17 Oct | Alton 18:20 | +2 min | +4 min |
| Fri 16 Oct | Alton 18:23 | +5 min | +6 min |
| Thu 15 Oct | Alton 18:20 | +1 min | +3 min |
| Wed 14 Oct | Alton 18:18 | 0 min | +1 min |
| Tue 13 Oct | Alton 18:17 | −1 min | +1 min |
| Mon 12 Oct | Alton 18:19 | 0 min | +2 min |
| Sun 11 Oct | Clapham Jn. C.S. 19:33 | +9 min | +9 min |
| Fri 9 Oct | Alton 18:17 | −1 min | +1 min |
| Thu 8 Oct | Alton 18:18 | −1 min | +4 min |
| Wed 7 Oct | Alton 18:20 | +2 min | +2 min |
| Tue 6 Oct | Alton 18:18 | 0 min | +1 min |
| Mon 5 Oct | Alton 18:18 | 0 min | +2 min |
| Sun 4 Oct | 87230 19:39 | +7 min | +7 min |
| Fri 2 Oct | Alton 18:26 | +8 min | +9 min |
| Thu 1 Oct | Alton 18:25 | +6 min | +6 min |
| Wed 30 Sept | Alton 18:18 | 0 min | +1 min |
| Tue 29 Sept | Alton 18:18 | 0 min | +1 min |
| Mon 28 Sept | Alton 18:18 | 0 min | +1 min |
| Sat 26 Sept | Alton 18:19 | 0 min | +2 min |
| Fri 25 Sept | Alton 18:21 | +2 min | +5 min |
| Thu 24 Sept | Alton 18:19 | +1 min | +2 min |
| Wed 23 Sept | Alton 19:12 | +54 min | +54 min |
| Tue 22 Sept | Alton 18:18 | 0 min | +1 min |
| Mon 21 Sept | Alton 18:20 | +1 min | +3 min |
| Sun 20 Sept | 87230 19:28 | +4 min | +6 min |
| Fri 18 Sept | Alton 18:20 | +3 min | +6 min |
| Thu 17 Sept | Alton 18:21 | +4 min | +4 min |
| Wed 16 Sept | Alton 18:18 | +1 min | +2 min |
| Tue 15 Sept | Alton 18:21 | +4 min | +4 min |
| Mon 14 Sept | Alton 18:37 | +19 min | +19 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.