Govia Thameslink Railway 879Y21
View line Govia Thameslink Railway
Alerts for train 879Y21
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
75%
21/28 runs under 3 min
RT coverage: 28 full · 0 partial · 0 no data
On-time · 90 days
82%
70/85 runs under 3 min
RT coverage: 85 full · 0 partial · 0 no data
Typical delay
+1min
Median at arrival, 90 days
30 days: +1 min
P90
+4min
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 25 Sept Max en route +12 min · last fix heading to Sevenoaks +11 min
- Wed 7 Oct Max en route +13 min · last fix heading to Shoreham (Kent) +10 min
- Wed 30 Sept Max en route +8 min · last fix heading to Sevenoaks +7 min
- Mon 14 Sept Max en route +6 min · last fix heading to Sevenoaks +6 min
- Fri 11 Sept Max en route +7 min · last fix heading to Sevenoaks +6 min
Distribution · 90 days
85 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 1% · 1
- On time 81% · 69
- 3–10 min 15% · 13
- 10–30 min 2% · 2
- 30+ min 0% · 0
On-time by weekday
- 92% M n=12
- 83% T n=12
- 69% W n=13
- 85% T n=13
- 69% F n=13
- 92% S n=13
- 89% S n=9
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 24 Oct | Sevenoaks 11:36 | +4 min | +4 min |
| Fri 23 Oct | Sevenoaks 11:36 | +3 min | +4 min |
| Thu 22 Oct | Sevenoaks 11:37 | +4 min | +5 min |
| Wed 21 Oct | Otford 11:37 | +4 min | +5 min |
| Tue 20 Oct | Otford 11:33 | 0 min | +1 min |
| Mon 19 Oct | Otford 11:34 | +1 min | +1 min |
| Sun 18 Oct | Otford 11:29 | +2 min | +2 min |
| Sat 17 Oct | Otford 11:34 | +1 min | +1 min |
| Fri 16 Oct | Shoreham (Kent) 11:34 | +1 min | +1 min |
| Thu 15 Oct | Otford 11:33 | 0 min | — |
| Wed 14 Oct | Otford 11:33 | 0 min | +1 min |
| Tue 13 Oct | Sevenoaks 11:35 | +2 min | +3 min |
| Mon 12 Oct | Sevenoaks 11:33 | 0 min | — |
| Sun 11 Oct | Otford 11:28 | +1 min | +4 min |
| Sat 10 Oct | Otford 11:34 | +1 min | +2 min |
| Fri 9 Oct | Sevenoaks 11:33 | 0 min | +1 min |
| Thu 8 Oct | Sevenoaks 11:35 | +2 min | +2 min |
| Wed 7 Oct | Shoreham (Kent) 11:43 | +10 min | +13 min |
| Tue 6 Oct | Otford 11:34 | +1 min | +2 min |
| Mon 5 Oct | 89347 11:33 | 0 min | +2 min |
| Sun 4 Oct | Sevenoaks 11:28 | +1 min | +3 min |
| Sat 3 Oct | Sevenoaks 11:33 | 0 min | +1 min |
| Fri 2 Oct | Sevenoaks 11:33 | 0 min | +1 min |
| Thu 1 Oct | Sevenoaks 11:33 | 0 min | — |
| Wed 30 Sept | Sevenoaks 11:40 | +7 min | +8 min |
| Tue 29 Sept | Sevenoaks 11:33 | 0 min | — |
| Mon 28 Sept | Sevenoaks 11:33 | 0 min | — |
| Sun 27 Sept | Sevenoaks 11:30 | +3 min | +3 min |
| Sat 26 Sept | Sevenoaks 11:33 | 0 min | +1 min |
| Fri 25 Sept | Sevenoaks 11:43 | +11 min | +12 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.