Govia Thameslink Railway 872B21
View line Govia Thameslink Railway
Alerts for train 872B21
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Govia Thameslink Railway.
The mini-map returns when the train runs
On-time · 30 days
90%
26/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
87%
77/89 runs under 3 min
RT coverage: 89 full · 0 partial · 0 no data
Typical delay
−1min
Median at arrival, 90 days
30 days: 0 min
P90
+4min
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
- Sun 16 Aug Max en route +34 min · last fix heading to 87199 +34 min
- Tue 8 Sept Max en route +21 min · last fix heading to 87199 +18 min
- Mon 3 Aug Max en route +15 min · last fix heading to 87199 +15 min
- Fri 31 Jul Max en route +30 min · last fix heading to 87199 +15 min
- Fri 18 Sept Max en route +13 min · last fix heading to 87199 +13 min
Distribution · 90 days
89 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 35% · 31
- On time 52% · 46
- 3–10 min 8% · 7
- 10–30 min 4% · 4
- 30+ min 1% · 1
On-time by weekday
- 92% M n=13
- 77% T n=13
- 92% W n=13
- 75% T n=12
- 85% F n=13
- 92% S n=13
- 92% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Wed 21 Oct | Clapham Jn. C.S. 09:11 | +1 min | +3 min |
| Tue 20 Oct | Clapham Jn. C.S. 20:18 | 0 min | +4 min |
| Mon 19 Oct | Clapham Jn. C.S. 20:19 | 0 min | +4 min |
| Sun 18 Oct | West Croydon 19:49 | 0 min | — |
| Sat 17 Oct | Clapham Jn. C.S. 20:19 | 0 min | +1 min |
| Fri 16 Oct | Wandsworth Common 20:17 | −1 min | +3 min |
| Thu 15 Oct | Clapham Jn. C.S. 20:18 | +1 min | +1 min |
| Wed 14 Oct | Clapham Jn. C.S. 20:21 | +4 min | +4 min |
| Tue 13 Oct | Wandsworth Common 20:21 | +3 min | +8 min |
| Mon 12 Oct | Wandsworth Common 20:19 | +1 min | +8 min |
| Sun 11 Oct | Clapham Jn. C.S. 20:20 | +2 min | +4 min |
| Sat 10 Oct | Clapham Jn. C.S. 20:19 | +1 min | +1 min |
| Fri 9 Oct | Clapham Jn. C.S. 20:18 | 0 min | +10 min |
| Thu 8 Oct | Clapham Jn. C.S. 20:17 | −1 min | +5 min |
| Wed 7 Oct | Clapham Jn. C.S. 20:17 | −1 min | +5 min |
| Tue 6 Oct | Wandsworth Common 20:16 | −2 min | +3 min |
| Mon 5 Oct | Wandsworth Common 20:15 | −3 min | +4 min |
| Sun 4 Oct | 87199 20:17 | −2 min | — |
| Sat 3 Oct | 87199 20:23 | +4 min | +4 min |
| Fri 2 Oct | 87199 20:16 | −1 min | +1 min |
| Thu 1 Oct | 87199 20:18 | 0 min | +2 min |
| Wed 30 Sept | 87199 20:18 | 0 min | +2 min |
| Tue 29 Sept | 87199 20:15 | −3 min | +2 min |
| Mon 28 Sept | 87199 20:16 | −2 min | +1 min |
| Sat 26 Sept | 87199 20:16 | −2 min | — |
| Fri 25 Sept | 87199 20:16 | −2 min | +3 min |
| Thu 24 Sept | 87199 20:16 | −2 min | +20 min |
| Wed 23 Sept | 87199 20:16 | −2 min | +20 min |
| Tue 22 Sept | 87199 20:17 | −1 min | +4 min |
| Mon 21 Sept | 87199 20:17 | −1 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.