Govia Thameslink Railway 871C20
View line Govia Thameslink Railway
Alerts for train 871C20
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
30%
7/23 runs under 3 min
RT coverage: 23 full · 0 partial · 0 no data
On-time · 90 days
34%
22/64 runs under 3 min
RT coverage: 64 full · 0 partial · 0 no data
Typical delay
+4min
Median at arrival, 90 days
30 days: +4 min
P90
+13min
9 in 10 runs arrive with less than this
30 days: +11 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
- Mon 31 Aug Max en route +25 min · last fix heading to Portsmouth & Southsea +25 min
- Mon 17 Aug Max en route +22 min · last fix heading to Portsmouth & Southsea +21 min
- Fri 14 Aug Max en route +23 min · last fix heading to Portsmouth & Southsea +20 min
- Mon 28 Sept Max en route +20 min · last fix heading to Portsmouth & Southsea +15 min
- Wed 26 Aug Max en route +16 min · last fix heading to Portsmouth & Southsea +14 min
Distribution · 90 days
64 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 34% · 22
- 3–10 min 45% · 29
- 10–30 min 20% · 13
- 30+ min 0% · 0
On-time by weekday
- 45% M n=11
- 50% T n=10
- 45% W n=11
- 18% T n=11
- 36% F n=11
- 10% S n=10
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 10 Oct | Portsmouth Harbour 12:40 | +11 min | +11 min |
| Fri 9 Oct | Portsmouth Harbour 12:30 | +1 min | +5 min |
| Thu 8 Oct | Portsmouth Harbour 12:32 | +4 min | +4 min |
| Wed 7 Oct | Portsmouth Harbour 12:34 | +5 min | +9 min |
| Tue 6 Oct | Portsmouth Harbour 12:27 | −1 min | +2 min |
| Mon 5 Oct | Portsmouth Harbour 12:28 | −1 min | +2 min |
| Sat 3 Oct | Havant 12:20 | +5 min | +5 min |
| Fri 2 Oct | Billingshurst 11:08 | +2 min | +3 min |
| Thu 1 Oct | Portsmouth Harbour 12:32 | +3 min | +9 min |
| Wed 30 Sept | Portsmouth Harbour 12:31 | +2 min | +6 min |
| Tue 29 Sept | Portsmouth Harbour 12:33 | +4 min | +5 min |
| Mon 28 Sept | Portsmouth & Southsea 12:36 | +15 min | +20 min |
| Sat 26 Sept | Portsmouth & Southsea 12:34 | +13 min | +15 min |
| Fri 25 Sept | Portsmouth Harbour 12:35 | +7 min | +7 min |
| Thu 24 Sept | Portsmouth Harbour 12:35 | +6 min | +11 min |
| Wed 23 Sept | Portsmouth Harbour 12:39 | +10 min | +18 min |
| Tue 22 Sept | Portsmouth Harbour 12:31 | +3 min | +6 min |
| Mon 21 Sept | Portsmouth Harbour 12:31 | +2 min | +6 min |
| Fri 18 Sept | Portsmouth & Southsea 12:30 | +9 min | +13 min |
| Thu 17 Sept | Portsmouth Harbour 14:34 | +5 min | +12 min |
| Wed 16 Sept | Portsmouth Harbour 12:28 | −1 min | +3 min |
| Tue 15 Sept | Portsmouth Harbour 12:33 | +4 min | +8 min |
| Mon 14 Sept | Portsmouth Harbour 12:34 | +6 min | +7 min |
| Mon 31 Aug | Portsmouth & Southsea 12:46 | +25 min | +25 min |
| Sat 29 Aug | Portsmouth Harbour 12:36 | +7 min | +9 min |
| Fri 28 Aug | Billingshurst 11:18 | +13 min | +14 min |
| Thu 27 Aug | Portsmouth Harbour 12:36 | +7 min | +10 min |
| Wed 26 Aug | Portsmouth & Southsea 12:35 | +14 min | +16 min |
| Tue 25 Aug | Portsmouth Harbour 12:28 | 0 min | +4 min |
| Mon 24 Aug | Portsmouth Harbour 12:35 | +6 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.