South Western Railway 871D21
View line South Western Railway
Alerts for train 871D21
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 ยท 30 days
90%
27/30 runs under 3 min
RT coverage: 30 full ยท 0 partial ยท 0 no data
On-time ยท 90 days
84%
75/89 runs under 3 min
RT coverage: 89 full ยท 0 partial ยท 0 no data
Typical delay
โ1min
Median at arrival, 90 days
30 days: โ2 min
P90
+3min
9 in 10 runs arrive with less than this
30 days: +1 min
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3โ10 min
- 10โ30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Fri 23 Oct Max en route +24 min ยท last fix heading to Ashtead +24 min
- Tue 22 Sept Max en route +17 min ยท last fix heading to Dorking +13 min
- Wed 26 Aug Max en route +16 min ยท last fix heading to Dorking +11 min
- Fri 18 Sept Max en route +13 min ยท last fix heading to Dorking +7 min
- Tue 8 Sept Max en route +6 min ยท last fix heading to Dorking +6 min
Distribution ยท 90 days
89 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 29% ยท 26
- On time 55% ยท 49
- 3โ10 min 12% ยท 11
- 10โ30 min 3% ยท 3
- 30+ min 0% ยท 0
On-time by weekday
- 100% M n=12
- 69% T n=13
- 85% W n=13
- 92% T n=13
- 69% F n=13
- 92% S n=13
- 83% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 1 Nov | Epsom 10:49 | +3 min | +6 min |
| Sat 31 Oct | Dorking 11:24 | 0 min | +2 min |
| Fri 30 Oct | Dorking 11:25 | 0 min | +3 min |
| Thu 29 Oct | Box Hill & Westhumble 11:17 | โ1 min | +1 min |
| Wed 28 Oct | Dorking 11:24 | 0 min | +3 min |
| Tue 27 Oct | Box Hill & Westhumble 11:23 | โ1 min | +4 min |
| Mon 26 Oct | Dorking 11:23 | โ2 min | โ |
| Sun 25 Oct | Box Hill & Westhumble 11:03 | โ2 min | +1 min |
| Sat 24 Oct | Dorking 11:22 | โ2 min | โ |
| Fri 23 Oct | Ashtead 11:30 | +24 min | +24 min |
| Thu 22 Oct | Dorking 11:25 | +1 min | +3 min |
| Wed 21 Oct | Box Hill & Westhumble 11:22 | โ2 min | +1 min |
| Tue 20 Oct | Dorking 11:22 | โ2 min | โ |
| Mon 19 Oct | Dorking 11:21 | โ3 min | +1 min |
| Sun 18 Oct | Box Hill & Westhumble 11:03 | โ2 min | +1 min |
| Sat 17 Oct | Box Hill & Westhumble 11:24 | โ1 min | โ |
| Fri 16 Oct | Dorking 11:25 | +1 min | +2 min |
| Thu 15 Oct | Dorking 11:22 | โ2 min | โ |
| Wed 14 Oct | Dorking 11:28 | +3 min | +4 min |
| Tue 13 Oct | Dorking 11:22 | โ2 min | โ |
| Mon 12 Oct | Dorking 11:23 | โ2 min | โ |
| Sun 11 Oct | Box Hill & Westhumble 11:02 | โ2 min | +1 min |
| Sat 10 Oct | Dorking 11:22 | โ2 min | โ |
| Fri 9 Oct | Dorking 11:23 | โ2 min | +3 min |
| Thu 8 Oct | Dorking 11:21 | โ3 min | +1 min |
| Wed 7 Oct | Dorking 11:25 | +1 min | +4 min |
| Tue 6 Oct | Dorking 11:22 | โ2 min | โ |
| Mon 5 Oct | Dorking 11:19 | 0 min | +3 min |
| Sun 4 Oct | Dorking 11:02 | โ3 min | +1 min |
| Sat 3 Oct | Dorking 11:25 | 0 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.