Govia Thameslink Railway 871Z50
View line Govia Thameslink Railway
Alerts for train 871Z50
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
—
Too little data (2/2 runs with data)
RT coverage: 2 full · 0 partial · 0 no data
On-time · 90 days
50%
6/12 runs under 3 min
RT coverage: 12 full · 0 partial · 0 no data
Typical delay
+6min
Median at arrival, 90 days
P90
+28min
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
- Sat 29 Aug Max en route +61 min · last fix heading to Portslade +61 min
- Tue 6 Oct Max en route +30 min · last fix heading to Lewes +28 min
- Wed 12 Aug Max en route +29 min · last fix heading to Portsmouth & Southsea +24 min
- Wed 26 Aug Max en route +20 min · last fix heading to Brighton +15 min
- Sun 20 Sept Max en route +11 min · last fix heading to Portsmouth Harbour +10 min
Distribution · 90 days
12 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 17% · 2
- On time 33% · 4
- 3–10 min 8% · 1
- 10–30 min 33% · 4
- 30+ min 8% · 1
On-time by weekday
- 100% M n=1
- 50% T n=2
- 0% W n=2
- 100% T n=1
- 100% F n=1
- 67% S n=3
- 0% S n=2
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 23 Oct | Worthing 08:07 | −1 min | +8 min |
| Tue 6 Oct | Lewes 20:49 | +28 min | +30 min |
| Sun 20 Sept | Portsmouth Harbour 20:58 | +10 min | +11 min |
| Sat 19 Sept | Portsmouth Harbour 21:31 | +2 min | +14 min |
| Sun 13 Sept | Portsmouth Harbour 21:12 | +9 min | +10 min |
| Sat 12 Sept | Portsmouth Harbour 21:27 | −1 min | +8 min |
| Sat 29 Aug | Portslade 20:33 | +61 min | +61 min |
| Thu 27 Aug | Brighton 19:40 | 0 min | +8 min |
| Wed 26 Aug | Brighton 19:55 | +15 min | +20 min |
| Tue 25 Aug | Brighton 19:35 | −5 min | +4 min |
| Mon 24 Aug | Brighton 19:38 | −2 min | +6 min |
| Wed 12 Aug | Portsmouth & Southsea 20:08 | +24 min | +29 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.