Chiltern Railways 631R12
View line Chiltern Railways
Alerts for train 631R12
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Chiltern Railways.
It does not run today
Last recorded run: Sunday 4 October −1 min
The mini-map returns when the train runs
On-time · 30 days
67%
2/3 runs under 3 min
RT coverage: 3 full · 0 partial · 0 no data
On-time · 90 days
82%
9/11 runs under 3 min
RT coverage: 11 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
P90
+4min
9 in 10 runs arrive with less than this
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 27 Sept Max en route +24 min · last fix heading to 66421 +24 min
- Sun 26 Jul Max en route +4 min · last fix heading to Warwick Parkway +4 min
Distribution · 90 days
11 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 82% · 9
- 3–10 min 9% · 1
- 10–30 min 9% · 1
- 30+ min 0% · 0
On-time by weekday
- 100% M n=1
- — T n=0
- — W n=0
- — T n=0
- — F n=0
- — S n=0
- 80% S n=10
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sun 4 Oct | 66421 10:18 | −1 min | +2 min |
| Sun 27 Sept | 66421 15:14 | +24 min | +24 min |
| Sun 20 Sept | 66421 10:17 | 0 min | +1 min |
| Mon 31 Aug | 66421 09:42 | −1 min | +1 min |
| Sun 30 Aug | 66421 10:17 | −1 min | +1 min |
| Sun 23 Aug | 66421 10:18 | −1 min | +3 min |
| Sun 16 Aug | 66421 13:25 | 0 min | — |
| Sun 9 Aug | 66421 10:21 | +2 min | +5 min |
| Sun 2 Aug | 66421 10:19 | +1 min | +2 min |
| Sun 26 Jul | Warwick Parkway 09:52 | +4 min | +4 min |
| Sun 19 Jul | 66421 10:18 | −1 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.