South Western Railway 821L52
View line South Western Railway
Alerts for train 821L52
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
45%
13/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
47%
38/81 runs under 3 min
RT coverage: 81 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +3 min
P90
+22min
9 in 10 runs arrive with less than this
30 days: +16 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 23 Oct Max en route +60 min · last fix heading to Clapham Jn. C.S. +58 min
- Thu 22 Oct Max en route +39 min · last fix heading to Andover +39 min
- Sun 27 Sept Max en route +57 min · last fix heading to 87286 +39 min
- Wed 14 Oct Max en route +27 min · last fix heading to Farnborough (Main) +26 min
- Wed 12 Aug Max en route +26 min · last fix heading to Farnborough (Main) +26 min
Distribution · 90 days
81 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 4% · 3
- On time 43% · 35
- 3–10 min 32% · 26
- 10–30 min 17% · 14
- 30+ min 4% · 3
On-time by weekday
- 42% M n=12
- 33% T n=12
- 33% W n=12
- 42% T n=12
- 25% F n=12
- 82% S n=11
- 80% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 30 Oct | Wimbledon 16:57 | +7 min | +10 min |
| Thu 29 Oct | Wimbledon 16:58 | +8 min | +8 min |
| Wed 28 Oct | Clapham Jn. C.S. 17:04 | +14 min | +14 min |
| Tue 27 Oct | Clapham Jn. C.S. 17:00 | +10 min | +10 min |
| Mon 26 Oct | Clapham Jn. C.S. 17:04 | +14 min | +14 min |
| Sun 25 Oct | Clapham Jn. C.S. 17:02 | +1 min | +3 min |
| Sat 24 Oct | Clapham Jn. C.S. 16:55 | −2 min | +3 min |
| Fri 23 Oct | Clapham Jn. C.S. 00:05 | +58 min | +60 min |
| Thu 22 Oct | Andover 16:05 | +39 min | +39 min |
| Wed 21 Oct | Clapham Jn. C.S. 16:57 | +7 min | +7 min |
| Tue 20 Oct | Clapham Jn. C.S. 16:59 | +9 min | +9 min |
| Mon 19 Oct | Clapham Jn. C.S. 16:55 | +5 min | +5 min |
| Sat 17 Oct | Clapham Jn. C.S. 16:53 | −4 min | +4 min |
| Fri 16 Oct | Clapham Jn. C.S. 16:49 | −1 min | +6 min |
| Thu 15 Oct | Clapham Jn. C.S. 17:01 | +10 min | +11 min |
| Wed 14 Oct | Farnborough (Main) 16:30 | +26 min | +27 min |
| Tue 13 Oct | Clapham Jn. C.S. 16:49 | −1 min | +1 min |
| Mon 12 Oct | Clapham Jn. C.S. 16:53 | +3 min | +8 min |
| Sun 11 Oct | Gillingham (Dorset) 14:54 | 0 min | — |
| Sat 10 Oct | Gillingham (Dorset) 14:51 | +1 min | +1 min |
| Fri 9 Oct | Wimbledon 16:51 | +1 min | +4 min |
| Thu 8 Oct | Wimbledon 16:52 | +2 min | +6 min |
| Wed 7 Oct | Wimbledon 16:53 | +3 min | +3 min |
| Tue 6 Oct | Wimbledon 16:52 | +1 min | +10 min |
| Mon 5 Oct | Wimbledon 16:52 | +2 min | +10 min |
| Sun 4 Oct | 87286 17:03 | +1 min | +4 min |
| Sat 3 Oct | 87286 16:57 | 0 min | +9 min |
| Fri 2 Oct | 87286 16:56 | +4 min | +13 min |
| Thu 1 Oct | 87286 16:55 | +3 min | +3 min |
| Wed 30 Sept | 87286 17:01 | +9 min | +9 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.