South Western Railway 871A20
View line South Western Railway
Alerts for train 871A20
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
32%
9/28 runs under 3 min
RT coverage: 28 full · 0 partial · 0 no data
On-time · 90 days
42%
36/86 runs under 3 min
RT coverage: 86 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +4 min
P90
+9min
9 in 10 runs arrive with less than this
30 days: +9 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 13 Sept Max en route +25 min · last fix heading to Brighton +23 min
- Thu 8 Oct Max en route +18 min · last fix heading to Clapham Jn. C.S. +18 min
- Sun 23 Aug Max en route +16 min · last fix heading to Brighton +15 min
- Sat 8 Aug Max en route +17 min · last fix heading to 87286 +15 min
- Sun 30 Aug Max en route +12 min · last fix heading to Brighton +12 min
Distribution · 90 days
86 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 1% · 1
- On time 41% · 35
- 3–10 min 49% · 42
- 10–30 min 9% · 8
- 30+ min 0% · 0
On-time by weekday
- 67% M n=12
- 15% T n=13
- 31% W n=13
- 33% T n=12
- 36% F n=11
- 69% S n=13
- 42% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Wed 21 Oct | Clapham Jn. C.S. 08:57 | 0 min | +2 min |
| Tue 20 Oct | Clapham Jn. C.S. 09:08 | +10 min | +10 min |
| Mon 19 Oct | Clapham Jn. C.S. 09:06 | +9 min | +9 min |
| Sun 18 Oct | Preston Park 13:13 | −1 min | +2 min |
| Sat 17 Oct | Clapham Jn. C.S. 09:06 | 0 min | +1 min |
| Fri 16 Oct | Clapham Jn. C.S. 09:06 | +9 min | +9 min |
| Thu 15 Oct | Clapham Jn. C.S. 09:01 | +4 min | +4 min |
| Wed 14 Oct | Clapham Jn. C.S. 09:08 | +11 min | +11 min |
| Tue 13 Oct | Wimbledon 09:02 | +5 min | +5 min |
| Mon 12 Oct | Clapham Jn. C.S. 09:03 | +6 min | +6 min |
| Sat 10 Oct | Clapham Jn. C.S. 09:26 | +7 min | +7 min |
| Fri 9 Oct | Wimbledon 09:00 | +3 min | +3 min |
| Thu 8 Oct | Clapham Jn. C.S. 09:15 | +18 min | +18 min |
| Wed 7 Oct | Clapham Jn. C.S. 09:04 | +7 min | +7 min |
| Tue 6 Oct | Clapham Jn. C.S. 09:00 | +3 min | +3 min |
| Mon 5 Oct | 87286 08:59 | +2 min | +3 min |
| Sun 4 Oct | Brighton 13:29 | +6 min | +9 min |
| Sat 3 Oct | 87286 09:20 | +4 min | +4 min |
| Fri 2 Oct | 87286 08:59 | +2 min | +3 min |
| Thu 1 Oct | 87286 09:03 | +6 min | +7 min |
| Wed 30 Sept | 87286 09:04 | +7 min | +7 min |
| Tue 29 Sept | 87286 09:04 | +7 min | +7 min |
| Mon 28 Sept | 87286 08:59 | +2 min | +3 min |
| Sun 27 Sept | Brighton 13:17 | +1 min | +2 min |
| Sat 26 Sept | 87286 09:06 | −1 min | +1 min |
| Fri 25 Sept | 87286 08:59 | +2 min | +3 min |
| Thu 24 Sept | 87286 09:01 | +3 min | +3 min |
| Wed 23 Sept | 87286 09:00 | +3 min | +3 min |
| Tue 22 Sept | 87286 09:03 | +6 min | +6 min |
| Mon 21 Sept | 87286 08:59 | +2 min | +2 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.