South Western Railway 871A39
View line South Western Railway
Alerts for train 871A39
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
69%
18/26 runs under 3 min
RT coverage: 26 full · 0 partial · 0 no data
On-time · 90 days
68%
56/82 runs under 3 min
RT coverage: 82 full · 0 partial · 0 no data
Typical delay
+1min
Median at arrival, 90 days
30 days: +1 min
P90
+10min
9 in 10 runs arrive with less than this
30 days: +12 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
- Sun 25 Oct Max en route +116 min · last fix heading to Clapham Jn. C.S. +116 min
- Thu 20 Aug Max en route +97 min · last fix heading to 86912 +91 min
- Sat 15 Aug Max en route +22 min · last fix heading to Alton +22 min
- Tue 27 Oct Max en route +22 min · last fix heading to Alton +19 min
- Mon 26 Oct Max en route +19 min · last fix heading to Alton +15 min
Distribution · 90 days
82 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 68% · 56
- 3–10 min 21% · 17
- 10–30 min 9% · 7
- 30+ min 2% · 2
On-time by weekday
- 69% M n=13
- 69% T n=13
- 85% W n=13
- 77% T n=13
- 83% F n=12
- 71% S n=7
- 18% S n=11
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Thu 5 Nov | Alton 15:14 | +1 min | +1 min |
| Wed 4 Nov | Alton 15:14 | +1 min | +3 min |
| Tue 3 Nov | Alton 15:14 | +1 min | +2 min |
| Mon 2 Nov | Alton 15:19 | +6 min | +7 min |
| Sun 1 Nov | Clapham Jn. C.S. 16:31 | +7 min | +9 min |
| Fri 30 Oct | Alton 15:21 | −1 min | +2 min |
| Thu 29 Oct | Alton 15:21 | −1 min | +3 min |
| Wed 28 Oct | Alton 15:21 | −1 min | +2 min |
| Tue 27 Oct | Alton 15:42 | +19 min | +22 min |
| Mon 26 Oct | Alton 15:37 | +15 min | +19 min |
| Sun 25 Oct | Clapham Jn. C.S. 18:22 | +116 min | +116 min |
| Fri 23 Oct | Alton 15:26 | +4 min | +4 min |
| Thu 22 Oct | Alton 15:21 | −1 min | +3 min |
| Wed 21 Oct | Alton 15:23 | +1 min | +1 min |
| Tue 20 Oct | Alton 15:26 | +3 min | +3 min |
| Mon 19 Oct | Alton 15:22 | 0 min | +6 min |
| Sun 18 Oct | New Cross Gate 16:26 | +1 min | +3 min |
| Sat 17 Oct | Alton 15:17 | −1 min | — |
| Fri 16 Oct | Alton 15:22 | −1 min | +2 min |
| Thu 15 Oct | Alton 15:23 | 0 min | +2 min |
| Wed 14 Oct | Alton 15:22 | −1 min | +2 min |
| Tue 13 Oct | Alton 15:21 | −1 min | +2 min |
| Mon 12 Oct | Alton 15:22 | −1 min | +4 min |
| Sun 11 Oct | East Croydon 16:31 | +8 min | +8 min |
| Fri 9 Oct | Alton 15:23 | 0 min | +4 min |
| Thu 8 Oct | Alton 15:21 | −1 min | +1 min |
| Wed 7 Oct | Alton 15:21 | −1 min | — |
| Tue 6 Oct | Alton 15:21 | −1 min | +1 min |
| Mon 5 Oct | Alton 15:22 | −1 min | +3 min |
| Sun 4 Oct | 87230 16:34 | +2 min | +3 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.