Depends on where you are going, though even Reading trains were affected earlier.
Emergency engineering works are taking place near London Waterloo to resolve a track defect that is preventing trains using platforms 1-4 at London Waterloo.
Because of this, the following changes will apply until further notice:
Trains between London Waterloo and Dorking are cancelled. Passengers should travel on Southern services between London Victoria and Dorking.
A train shuttle service is in operation between Hampton Court and Surbiton. Passengers will need to change trains at Surbiton
Trains between London Waterloo and Chessington South are cancelled. Passengers travelling Malden Manor, Tolworth, Chessington North and Chessington South will need to travel on alternative train services to Surbiton and change for a London Bus service to their destination. Passengers will be accepted on the following routes. Surbiton to Malden Manor - K1. Surbiton to Tolworth - K1. Surbiton to Chessington South/North - 465, 65, K4.
Services that run from London Waterloo at 50 minutes past each hour to Salisbury / Yeovil Junction / Gillingham are not running between Waterloo and Basingstoke. Customers travelling from London Waterloo / Woking will need change trains at Basingstoke or travel on services to Exeter St Davids departing London Waterloo at 20 minutes past each hour
Some services heading towards London Waterloo may be cancelled before they reach London Waterloo in order to ease congestion at the station.
Other services may be delayed by up to 30 minutes