Buses are replacing trains from Surbiton towards Woking until 7.30am.
There is over-running engineering work taking place between Weybridge and West Byfleet.
Because of this, a limited bus service is running from Surbiton towards Woking. This will continue until approximately 07:30.
Trains are running from Woking towards London Waterloo.
The route affected: London Waterloo, Wimbledon, Surbiton, Esher, Hersham, Walton-on-Thames, Byfleet & New Haw, West Byfleet, Woking and Guildford.
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Train services through Gatwick Airport face delays and disruption after a track fire closed half of the lines at the station.
Network Rail has reopened two of the four lines but two will remain closed for the rest of the day.
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