Engineering work is taking place between Purley and Gatwick Airport, closing some lines.
No trains will call at Earlswood and Salfords, your tickets will be accepted on Metrobus services 100 / 400 / 420 / 460 between Redhill and Three Bridges at no extra cost.
Trains between London and Three Bridges / Brighton / Horsham will have extended journey times.
Additionally, on Saturday, trains which usually run between Peterborough and Horsham will run as two separate services between Peterborough and London Kings Cross and between London Bridge and Horsham. You should use alternative Thameslink services between London St Pancras International and London Bridge.
Check before you travel:
If you are travelling with Thameslink, you can plan your journey using the National Rail Journey Planner.
You can plan your journey on Metrobuses by using the Transport for London Journey Planner.