Overrunning engineering work between Gatwick Airport and Redhill means services are subject to delays, cancellations and disruption on Tuesday May 2), according to Southern Railway.
A spokesman for Southern Railway said disruption is expected until 4pm.
Ticket acceptance is in place on Thameslink Railway, Southeastern Railway, London Underground and the Gatwick Express.
A spokesman for National Railway said there will be no Great Western Railway Service between Redhill and Gatwick Airport until 5pm on Tuesday.
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