Engineering work is taking place between London Victoria and Clapham Junction, and also between East Croydon and Gatwick Airport, closing some lines overnight from Monday evening until Friday morning.
Between approximately 23:45 and 05:00 each night, Gatwick Express and Southern trains between London Victoria and Clapham Junction, and also between East Croydon and Gatwick Airport will be retimed by a few minutes.
Check before you travel:
You can plan your journey using the National Rail Journey Planner.