A fault with the signalling system between Chessington North and Chessington South means all lines are blocked.
Services between London Waterloo and Chessington South will be revised to run between London Waterloo and Epsom. Malden Manor, Tolworth, Chessington North and Chessington South will not be served.
Disruption is expected until 13:00.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.