Govia Thameslink Railway 861B21
View line Govia Thameslink Railway
Alerts for train 861B21
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
31%
9/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
27%
24/89 runs under 3 min
RT coverage: 89 full · 0 partial · 0 no data
Typical delay
+5min
Median at arrival, 90 days
30 days: +5 min
P90
+18min
9 in 10 runs arrive with less than this
30 days: +13 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 +26 min · last fix heading to 87230 +26 min
- Sat 22 Aug Max en route +25 min · last fix heading to 87230 +24 min
- Fri 14 Aug Max en route +24 min · last fix heading to 87230 +22 min
- Sun 11 Oct Max en route +22 min · last fix heading to Clapham Jn. C.S. +20 min
- Mon 31 Aug Max en route +21 min · last fix heading to 87230 +20 min
Distribution · 90 days
89 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% · 2
- On time 25% · 22
- 3–10 min 39% · 35
- 10–30 min 34% · 30
- 30+ min 0% · 0
On-time by weekday
- 8% M n=12
- 15% T n=13
- 31% W n=13
- 23% T n=13
- 15% F n=13
- 54% S n=13
- 42% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 18 Oct | New Cross Gate 11:34 | −4 min | +2 min |
| Sat 17 Oct | Clapham Jn. C.S. 11:37 | +10 min | +11 min |
| Fri 16 Oct | East Croydon 11:35 | +12 min | +12 min |
| Thu 15 Oct | East Croydon 11:23 | 0 min | +2 min |
| Wed 14 Oct | Clapham Jn. C.S. 11:32 | +9 min | +11 min |
| Tue 13 Oct | Clapham Jn. C.S. 11:28 | +5 min | +6 min |
| Mon 12 Oct | Earlswood (Surrey) 11:26 | +3 min | +3 min |
| Sun 11 Oct | Clapham Jn. C.S. 11:52 | +20 min | +22 min |
| Sat 10 Oct | Clapham Jn. C.S. 11:25 | +2 min | +6 min |
| Fri 9 Oct | East Croydon 11:23 | 0 min | +2 min |
| Thu 8 Oct | Clapham Jn. C.S. 11:27 | +4 min | +7 min |
| Wed 7 Oct | East Croydon 11:33 | +10 min | +13 min |
| Tue 6 Oct | Earlswood (Surrey) 11:27 | +4 min | +5 min |
| Mon 5 Oct | 87230 12:35 | +5 min | +6 min |
| Sun 4 Oct | 87230 11:43 | 0 min | +8 min |
| Sat 3 Oct | 87230 11:25 | +2 min | +3 min |
| Fri 2 Oct | 87230 11:40 | +17 min | +18 min |
| Thu 1 Oct | 87230 11:35 | +12 min | +14 min |
| Wed 30 Sept | 87230 11:28 | +5 min | +6 min |
| Tue 29 Sept | 87230 11:28 | +5 min | +6 min |
| Mon 28 Sept | 87230 11:49 | +26 min | +26 min |
| Sat 26 Sept | 87230 11:28 | +4 min | +4 min |
| Fri 25 Sept | 87230 11:28 | +5 min | +7 min |
| Thu 24 Sept | 87230 11:31 | +8 min | +9 min |
| Wed 23 Sept | 87230 11:27 | +3 min | +5 min |
| Tue 22 Sept | 87230 11:24 | +1 min | +3 min |
| Mon 21 Sept | 87230 11:29 | +6 min | +7 min |
| Sun 20 Sept | 86445 09:45 | 0 min | — |
| Sat 19 Sept | 86445 09:43 | +1 min | +1 min |
| Fri 18 Sept | 87230 11:26 | +3 min | +5 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.