Govia Thameslink Railway 871L51
View line Govia Thameslink Railway
Alerts for train 871L51
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
47%
14/30 runs under 3 min
RT coverage: 30 full · 0 partial · 0 no data
On-time · 90 days
48%
43/89 runs under 3 min
RT coverage: 89 full · 0 partial · 0 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +3 min
P90
+15min
9 in 10 runs arrive with less than this
30 days: +8 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 +65 min · last fix heading to 87230 +65 min
- Mon 17 Aug Max en route +36 min · last fix heading to 87230 +34 min
- Fri 23 Oct Max en route +33 min · last fix heading to Grateley +32 min
- Fri 7 Aug Max en route +25 min · last fix heading to 82206 +21 min
- Tue 29 Sept Max en route +19 min · last fix heading to 87230 +19 min
Distribution · 90 days
89 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 48% · 43
- 3–10 min 40% · 36
- 10–30 min 8% · 7
- 30+ min 3% · 3
On-time by weekday
- 69% M n=13
- 15% T n=13
- 77% W n=13
- 50% T n=12
- 31% F n=13
- 38% S n=13
- 58% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Wed 4 Nov | South Croydon 18:34 | +2 min | +6 min |
| Tue 3 Nov | East Croydon 18:34 | +3 min | +5 min |
| Mon 2 Nov | Clapham Jn. C.S. 18:38 | +5 min | +5 min |
| Sun 1 Nov | East Croydon 18:39 | +2 min | +3 min |
| Sat 31 Oct | South Croydon 18:43 | +3 min | +4 min |
| Fri 30 Oct | Clapham Jn. C.S. 18:40 | 0 min | +2 min |
| Thu 29 Oct | Sanderstead 18:43 | +3 min | +4 min |
| Wed 28 Oct | Clapham Jn. C.S. 18:42 | +2 min | +4 min |
| Tue 27 Oct | Clapham Jn. C.S. 18:41 | 0 min | +4 min |
| Mon 26 Oct | South Croydon 18:41 | +2 min | +2 min |
| Sun 25 Oct | East Croydon 18:51 | +3 min | +4 min |
| Sat 24 Oct | Clapham Jn. C.S. 18:42 | +2 min | +11 min |
| Fri 23 Oct | Grateley 21:48 | +32 min | +33 min |
| Thu 22 Oct | Clapham Jn. C.S. 18:42 | +2 min | +3 min |
| Wed 21 Oct | South Croydon 18:42 | +2 min | +8 min |
| Tue 20 Oct | Grateley 18:44 | +4 min | +4 min |
| Mon 19 Oct | Sanderstead 18:40 | 0 min | — |
| Sun 18 Oct | New Cross Gate 18:51 | 0 min | +2 min |
| Sat 17 Oct | Clapham Jn. C.S. 18:49 | +9 min | +9 min |
| Fri 16 Oct | Clapham Jn. C.S. 18:46 | +6 min | +6 min |
| Thu 15 Oct | East Croydon 18:42 | +2 min | +2 min |
| Wed 14 Oct | Clapham Jn. C.S. 18:47 | +7 min | +7 min |
| Tue 13 Oct | South Croydon 18:44 | +4 min | +4 min |
| Mon 12 Oct | Grateley 18:43 | +2 min | +6 min |
| Sun 11 Oct | Clapham Jn. C.S. 18:56 | +8 min | +8 min |
| Sat 10 Oct | Clapham Jn. C.S. 18:46 | +6 min | +6 min |
| Fri 9 Oct | Grateley 18:49 | +9 min | +9 min |
| Thu 8 Oct | Clapham Jn. C.S. 18:43 | +3 min | +4 min |
| Wed 7 Oct | South Croydon 18:42 | +1 min | +5 min |
| Tue 6 Oct | South Croydon 18:43 | +3 min | +4 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.