This is due to engineering work affecting lines in both the Ascot and Guildford areas throughout the day.
We have broken down the details to help you plan ahead.
Sunday (January 18):
All lines in the Ascot area will be closed all day due to maintenance work.
Longcross station will be closed all day.
London Waterloo to Reading services will terminate at Staines, with replacement buses running between Staines and Reading.
These buses will not call at Longcross.
London Waterloo to Woking via Staines services will be diverted after Staines and will terminate at Windsor.
Replacement buses will run between Staines and Woking.
Ascot to Guildford via Aldershot services will start from Aldershot, with replacement buses running between Ascot and Aldershot.
Some lines in the Guildford area will also be closed all day due to maintenance work.
London Waterloo to Portsmouth via Guildford services will be diverted between Clapham Junction and Guildford and will terminate at Guildford.
These services will not call at Woking.
Replacement buses will run between Woking, Guildford, and Haslemere.
A revised train service will run between Haslemere and Portsmouth.
London Waterloo to Guildford via Woking stopping services will terminate at Woking.
Non stop buses will run between Woking and Guildford.
Stopping buses will also run between Woking, Worplesdon, and Guildford.
Ascot to Guildford via Aldershot services will start from Aldershot due to the Ascot area closure.
Replacement buses will run between Ascot and Aldershot.
Anyone travelling after 10pm or before 5am have been urged to check travel times, as buses can replace trains at short notice.
