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
68%
17/25 runs under 3 min
RT coverage: 25 full · 0 partial · 0 no data
On-time · 90 days
74%
56/76 runs under 3 min
RT coverage: 76 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+6min
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
- 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 26 Oct Max en route +18 min · last fix heading to Tyseley +17 min
- Thu 5 Nov Max en route +14 min · last fix heading to Princes Risborough +14 min
- Tue 3 Nov Max en route +9 min · last fix heading to Tyseley +8 min
Distribution · 90 days
76 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 17% · 13
- On time 57% · 43
- 3–10 min 21% · 16
- 10–30 min 5% · 4
- 30+ min 0% · 0
On-time by weekday
- 58% M n=12
- 69% T n=13
- 77% W n=13
- 77% T n=13
- 62% F n=13
- 100% S n=12
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 7 Nov | Tyseley 12:04 | −1 min | +1 min |
| Fri 6 Nov | Tyseley 12:04 | 0 min | +1 min |
| Thu 5 Nov | Princes Risborough 11:28 | +14 min | +14 min |
| Wed 4 Nov | Tyseley 12:09 | +4 min | +6 min |
| Tue 3 Nov | Tyseley 12:13 | +8 min | +9 min |
| Mon 2 Nov | Tyseley 12:04 | +2 min | +3 min |
| Sat 31 Oct | Tyseley 12:12 | −1 min | +2 min |
| Fri 30 Oct | Tyseley 12:17 | +4 min | +6 min |
| Thu 29 Oct | Tyseley 12:13 | 0 min | +1 min |
| Wed 28 Oct | Tyseley 12:14 | 0 min | +3 min |
| Tue 27 Oct | Tyseley 12:12 | −1 min | +3 min |
| Mon 26 Oct | Tyseley 12:30 | +17 min | +18 min |
| Sat 24 Oct | Tyseley 12:13 | 0 min | +1 min |
| Fri 23 Oct | Tyseley 12:15 | +2 min | +5 min |
| Thu 22 Oct | Tyseley 12:14 | 0 min | +6 min |
| Wed 21 Oct | Tyseley 12:17 | +4 min | +5 min |
| Tue 20 Oct | Tyseley 12:17 | +4 min | +6 min |
| Mon 19 Oct | Tyseley 12:20 | +7 min | +8 min |
| Sat 17 Oct | Tyseley 12:16 | +2 min | +2 min |
| 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 |
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.