South Western Railway 872Z21
View line South Western Railway
Alerts for train 872Z21
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
88%
7/8 runs under 3 min
RT coverage: 8 full · 0 partial · 0 no data
On-time · 90 days
69%
9/13 runs under 3 min
RT coverage: 13 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+5min
9 in 10 runs arrive with less than this
30 days: +2 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
- Mon 28 Sept Max en route +36 min · last fix heading to 87199 +35 min
- Sun 27 Sept Max en route +7 min · last fix heading to 87125 +5 min
- Wed 9 Sept Max en route +8 min · last fix heading to 87199 +5 min
- Sun 25 Oct Max en route +18 min · last fix heading to Portsmouth & Southsea +4 min
Distribution · 90 days
13 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 15% · 2
- On time 54% · 7
- 3–10 min 23% · 3
- 10–30 min 0% · 0
- 30+ min 8% · 1
On-time by weekday
- 0% M n=1
- — T n=0
- 0% W n=1
- — T n=0
- — F n=0
- 100% S n=6
- 60% S n=5
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 1 Nov | Twickenham 09:47 | −2 min | +1 min |
| Sat 31 Oct | Twickenham 09:55 | 0 min | +1 min |
| Sun 25 Oct | Portsmouth & Southsea 11:13 | +4 min | +18 min |
| Sat 24 Oct | St Margarets (London) 09:55 | −1 min | +1 min |
| Sat 17 Oct | Addlestone 14:41 | 0 min | — |
| Sun 11 Oct | Clapham Jn. C.S. 12:03 | +1 min | +2 min |
| Sat 10 Oct | Twickenham 08:54 | −1 min | — |
| Sun 4 Oct | 87125 09:53 | −2 min | +1 min |
| Sat 3 Oct | 87125 09:54 | 0 min | — |
| Mon 28 Sept | 87199 12:49 | +35 min | +36 min |
| Sun 27 Sept | 87125 09:54 | +5 min | +7 min |
| Wed 9 Sept | 87199 16:17 | +5 min | +8 min |
| Sat 8 Aug | 86010 16:16 | +1 min | +1 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.