Chiltern Railways 631R21
View line Chiltern Railways
Alerts for train 631R21
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.
The mini-map returns when the train runs
On-time · 30 days
85%
22/26 runs under 3 min
RT coverage: 26 full · 0 partial · 0 no data
On-time · 90 days
78%
59/76 runs under 3 min
RT coverage: 76 full · 0 partial · 0 no data
Typical delay
−1min
Median at arrival, 90 days
30 days: −1 min
P90
+6min
9 in 10 runs arrive with less than this
30 days: +4 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
- Fri 9 Oct Max en route +26 min · last fix heading to Tyseley +26 min
- Fri 28 Aug Max en route +24 min · last fix heading to 66421 +23 min
- Mon 10 Aug Max en route +25 min · last fix heading to 66421 +23 min
- Wed 7 Oct Max en route +10 min · last fix heading to Tyseley +8 min
- Thu 27 Aug Max en route +15 min · last fix heading to 66421 +7 min
Distribution · 90 days
76 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 24% · 18
- On time 54% · 41
- 3–10 min 18% · 14
- 10–30 min 4% · 3
- 30+ min 0% · 0
On-time by weekday
- 54% M n=13
- 85% T n=13
- 92% W n=13
- 85% T n=13
- 62% F n=13
- 91% S n=11
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 16 Oct | Tyseley 12:11 | −2 min | +1 min |
| Thu 15 Oct | Tyseley 12:16 | +2 min | +4 min |
| Wed 14 Oct | Tyseley 12:11 | −2 min | +8 min |
| Tue 13 Oct | Tyseley 12:11 | −2 min | +2 min |
| Mon 12 Oct | Tyseley 12:13 | 0 min | +1 min |
| Sat 10 Oct | Tyseley 12:13 | 0 min | +1 min |
| Fri 9 Oct | Tyseley 12:39 | +26 min | +26 min |
| Thu 8 Oct | Tyseley 12:11 | −2 min | +3 min |
| Wed 7 Oct | Tyseley 12:21 | +8 min | +10 min |
| Tue 6 Oct | Tyseley 12:14 | 0 min | +9 min |
| Mon 5 Oct | Tyseley 12:14 | +1 min | +4 min |
| Sat 3 Oct | 66421 12:12 | −1 min | +1 min |
| Fri 2 Oct | 66421 12:11 | −2 min | +3 min |
| Thu 1 Oct | 66421 12:12 | −1 min | +4 min |
| Wed 30 Sept | 66421 12:11 | −2 min | +1 min |
| Tue 29 Sept | 66421 12:12 | −1 min | +3 min |
| Mon 28 Sept | 66421 12:14 | +1 min | +4 min |
| Sat 26 Sept | 66421 12:12 | −1 min | +2 min |
| Fri 25 Sept | 66421 12:12 | −2 min | +1 min |
| Thu 24 Sept | 66421 12:12 | −2 min | +4 min |
| Wed 23 Sept | 66421 12:12 | −2 min | +2 min |
| Tue 22 Sept | 66421 12:17 | +4 min | +16 min |
| Mon 21 Sept | 66421 12:16 | +3 min | +7 min |
| Sat 19 Sept | 66421 12:12 | −1 min | +1 min |
| Fri 18 Sept | 66421 12:14 | +1 min | +5 min |
| Thu 17 Sept | 66421 12:12 | −1 min | +6 min |
| Wed 16 Sept | 66421 12:13 | 0 min | +2 min |
| Tue 15 Sept | 66421 12:14 | +1 min | +4 min |
| Mon 14 Sept | 66421 12:12 | −1 min | +3 min |
| Fri 11 Sept | 66421 12:18 | +5 min | +7 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.