South Western Railway

Between 6 Aug 2026 to 23 Sept 2026, South Western Railway ran 88,549 recorded services and finished the period on 87% of its measured arrivals within five minutes, within a couple of points of the network as a whole.

Over 49 archived days that is 1,807 services a day, 7.4% of the national timetable. Of 55,905 recorded arrivals, 48,876 were within five minutes and 428 were more than half an hour down.

Its week is strongly peaked: 2,009 services on Saturday, 29 August 2026 against 1,175 on Sunday, 20 September 2026, a swing of 1.7 times.

The average delay at destination was 1.8 minutes. The worst single arrival recorded was 4h 22m behind schedule, London Waterloo to Weybridge on Tuesday, 25 August 2026.

The day-to-day spread is wide — 24 points between its best day, Friday, 4 September 2026 at 94%, and its worst, Saturday, 5 September 2026 at 70%.

1,634 services were cancelled, 1.8% of everything booked — close to the 2.4% the network cancelled over the same dates. The worst single day was Friday, 18 September 2026, at 8% of that day's timetable.

Counting those cancellations as failures, the way the industry's own measure does, takes the on-time share from 87% of recorded arrivals to 85% of everything booked whose outcome is known — 2.5 points.

South Western Railway in numbers

Every percentage among the bands is of the 55,905 services whose arrival reached the archive, not of all 88,549, and the bands are exclusive. 31,010 ran without an arrival being recorded, and nothing is claimed about those. The row counting cancellations is those same 48,876 on-time arrivals over a denominator that also holds the 1,634 trains that did not run at all. Delay is judged at the destination, a stricter test than the industry's own measure and not comparable with it. The on-time share and the average delay answer different questions.

Day by day

49 archived days, 6 Aug 2026 to 23 Sept 2026, widest bar the busiest, filled to the share that arrived within five minutes. The same days across every operator.

In the daily longest-delay league

South Western Railway appears 27 times across 49 archived days, on 7 separate dates in the ten shown. These are appearances in the daily league, not this operator's own worst delays.

Recorded live from the Darwin and TRUST feeds on each of the 49 days above, and aggregated here. SW is this operator's ATOC code. How these figures are measured · All operators · Sources and licences