London Waterloo trains and South Western Railway travel advice: How to get around despite the delays
Rail commuters faced a chaotic start to the working week after overrunning engineering works sparked delays on Southern and South Western Railway trains.
Passengers were warned not to attempt to travel to Waterloo on Monday morning.
A spokesman for South Western Railway (SWR) said: "Due to overrunning engineering works between London Waterloo and Surbiton all lines are blocked.
"Train services running to and from these stations will be cancelled, delayed or revised."
Disruption is expected to last until the end of the day.
Disruption is also expected on Southern and Thameslink until at least midday due to "overrunning engineering work at various locations."
Passengers travelling from the Epsom and Dorking areas can expect delays to their travel.
Here's everything you need to know about alternative routes to London Waterloo:
Alternative Routes for South Western Passengers
Southern Rail services via any reasonable route (in the London area)
London Underground services via any reasonable route
TfL Bus services from Chessington South/Surbiton/Teddington from/towards London Waterloo
GWR services via any reasonable route
Cross Country services between Bournemouth and Reading
Local bus services between Guildford and Haslemere on routes 70, 71 and 72
Local bus services between Camberley, Frimley and Aldershot
If you hold a SWRcar park season ticket, you can park at any SWR station today. Your train ticket will be accepted from that station.
For further updates, check the South Western website or their Twitter.
Alternative Routes for Southern Passengers
London Tramlink between Beckenham Junction and Wimbledon
London Underground via any reasonable route
London Buses via any reasonable route
Mutual ticket acceptance between Southern and Thameslink
Great Western Railway between Dorking and Deepdane and Redhill
Metrobus between Redhill, Gatwick Airport, Three Bridges and Crawley, and also between Epsom and Tattenham Corner
Brighton & Hove buses between Uckfield,Crowborough and Tunbridge Wells
Compass buses between Three Bridges and Uckfield
Southeastern between Tunbridge Wells and London
For more updates, check the Southern Rail website or Twitter page.