London Underground 512I21
View line London Underground
Alerts for train 512I21
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line London Underground.
The mini-map returns when the train runs
On-time · 30 days
100%
14/14 runs under 3 min
RT coverage: 14 full · 0 partial · 0 no data
On-time · 90 days
92%
44/48 runs under 3 min
RT coverage: 48 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+2min
9 in 10 runs arrive with less than this
30 days: +2 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
- Tue 28 Jul Max en route +20 min · last fix heading to Kew Gardens +20 min
- Wed 19 Aug Max en route +8 min · last fix heading to 87130 +8 min
- Tue 8 Sept Max en route +5 min · last fix heading to 87130 +5 min
- Mon 7 Sept Max en route +5 min · last fix heading to 87130 +5 min
Distribution · 90 days
48 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% · 1
- On time 90% · 43
- 3–10 min 6% · 3
- 10–30 min 2% · 1
- 30+ min 0% · 0
On-time by weekday
- 89% M n=9
- 80% T n=10
- 90% W n=10
- 100% T n=9
- 100% F n=10
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 12 Oct | Gunnersbury 07:07 | +2 min | +4 min |
| Fri 9 Oct | Kew Gardens 07:05 | 0 min | — |
| Thu 8 Oct | — 12:59 | 0 min | — |
| Tue 6 Oct | Kew Gardens 07:05 | 0 min | — |
| Mon 5 Oct | Kew Gardens 14:33 | −4 min | — |
| Fri 2 Oct | 87130 07:06 | 0 min | +1 min |
| Tue 29 Sept | 87130 12:38 | 0 min | — |
| Mon 28 Sept | 87130 07:05 | 0 min | — |
| Fri 25 Sept | 87130 07:05 | 0 min | — |
| Thu 24 Sept | 87130 07:06 | +1 min | +1 min |
| Wed 23 Sept | 87132 06:46 | +2 min | +3 min |
| Tue 22 Sept | 87130 07:06 | +1 min | +1 min |
| Mon 21 Sept | 87130 07:05 | 0 min | — |
| Thu 17 Sept | 87130 13:06 | 0 min | +11 min |
| Fri 11 Sept | 87130 07:05 | 0 min | +1 min |
| Thu 10 Sept | 87130 07:06 | +1 min | +1 min |
| Wed 9 Sept | 87130 07:06 | +1 min | +1 min |
| Tue 8 Sept | 87130 07:10 | +5 min | +5 min |
| Mon 7 Sept | 87130 07:10 | +5 min | +5 min |
| Fri 4 Sept | 87130 07:06 | +1 min | +1 min |
| Thu 3 Sept | 87130 07:06 | +1 min | +1 min |
| Wed 2 Sept | Kew Gardens 08:35 | 0 min | — |
| Tue 1 Sept | 87130 07:06 | 0 min | +1 min |
| Wed 26 Aug | 87130 07:05 | +1 min | +1 min |
| Tue 25 Aug | 87130 07:06 | +1 min | +3 min |
| Mon 24 Aug | 87130 07:06 | +1 min | +2 min |
| Fri 21 Aug | 87130 07:05 | 0 min | +1 min |
| Wed 19 Aug | 87130 07:13 | +8 min | +8 min |
| Fri 14 Aug | 87130 07:04 | −1 min | — |
| Thu 13 Aug | 87130 07:06 | +1 min | +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.