Govia Thameslink Railway 871K21
View line Govia Thameslink Railway
Alerts for train 871K21
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 ยท 30 days
88%
21/24 runs under 3 min
RT coverage: 24 full ยท 0 partial ยท 0 no data
On-time ยท 90 days
95%
71/75 runs under 3 min
RT coverage: 75 full ยท 0 partial ยท 0 no data
Typical delay
โ1min
Median at arrival, 90 days
30 days: โ1 min
P90
+1min
9 in 10 runs arrive with less than this
30 days: +3 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
- Wed 23 Sept Max en route +38 min ยท last fix heading to Cheam +38 min
- Fri 16 Oct Max en route +16 min ยท last fix heading to Cheam +5 min
- Sat 26 Sept Max en route +6 min ยท last fix heading to Epsom +4 min
- Tue 21 Jul Max en route +5 min ยท last fix heading to Epsom +3 min
Distribution ยท 90 days
75 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 31% ยท 23
- On time 64% ยท 48
- 3โ10 min 4% ยท 3
- 10โ30 min 0% ยท 0
- 30+ min 1% ยท 1
On-time by weekday
- 100% M n=12
- 92% T n=13
- 92% W n=13
- 100% T n=12
- 92% F n=13
- 92% S n=12
- โ S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 16 Oct | Cheam 11:22 | +5 min | +16 min |
| Thu 15 Oct | Epsom 11:17 | โ1 min | โ |
| Wed 14 Oct | Epsom 11:16 | โ2 min | โ |
| Tue 13 Oct | Epsom 11:17 | โ1 min | โ |
| Mon 12 Oct | Epsom 11:16 | โ2 min | +2 min |
| Sat 10 Oct | Epsom 11:17 | โ1 min | โ |
| Fri 9 Oct | Epsom 11:17 | โ1 min | +2 min |
| Thu 8 Oct | Epsom 11:17 | โ1 min | +1 min |
| Wed 7 Oct | Epsom 11:16 | โ2 min | โ |
| Tue 6 Oct | Epsom 11:19 | +2 min | +3 min |
| Mon 5 Oct | Epsom 11:17 | โ1 min | โ |
| Sat 3 Oct | Epsom 11:16 | โ2 min | โ |
| Fri 2 Oct | Epsom 11:18 | 0 min | +1 min |
| Thu 1 Oct | Epsom 11:17 | 0 min | +2 min |
| Wed 30 Sept | Epsom 11:16 | โ1 min | +4 min |
| Tue 29 Sept | Epsom 11:16 | โ1 min | +1 min |
| Mon 28 Sept | Epsom 11:16 | โ2 min | +1 min |
| Sat 26 Sept | Epsom 11:22 | +4 min | +6 min |
| Fri 25 Sept | Epsom 11:16 | โ2 min | โ |
| Thu 24 Sept | Epsom 11:16 | โ1 min | โ |
| Wed 23 Sept | Cheam 11:43 | +38 min | +38 min |
| Tue 22 Sept | Epsom 11:16 | โ1 min | โ |
| Mon 21 Sept | Epsom 11:17 | โ1 min | +1 min |
| Sat 19 Sept | Epsom 11:16 | โ2 min | โ |
| Fri 18 Sept | Epsom 11:17 | 0 min | +3 min |
| Thu 17 Sept | Epsom 11:19 | +1 min | +3 min |
| Wed 16 Sept | Epsom 11:16 | โ2 min | +1 min |
| Tue 15 Sept | Epsom 11:17 | 0 min | +1 min |
| Mon 14 Sept | Epsom 11:16 | โ1 min | โ |
| Sat 12 Sept | Epsom 11:17 | โ1 min | โ |
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.