South West Trains are promising that commuter services will be "normal" in the morning, following hours of delays due to engineering work.
In a statement, the company said: "Safety is our absolute priority. We have no choice but to make sure these repairs are carried out before we can restore train services on these lines."
Trains on some of the country's busiest routes were cancelled or delayed tonight because of emergency engineering work and signalling problems, causing travel chaos for thousands of passengers.
South West Trains services to and from London Waterloo were hit at the height of the evening rush hour, on one of the hottest days of the year.The disruption was caused by emergency engineering work outside Waterloo, and signalling problems near Haslemere in Surrey.
A spokeswoman for South West Trains said:
"We would like to apologise for the disruption our customers will face on their journeys home tonight.
As a result of emergency engineering work to fix a track defect, we are unable to use four platforms at Waterloo which is having a serious impact on the services we can deliver.
Because of that we will have to run an amended timetable for the rest of the day.
Safety is our absolute priority. We have no choice but to make sure these repairs are carried out before we can restore train services. We expect to run a normal service from tomorrow morning. We would like to apologise again to our customers for this and thank them for their patience"
@alstewitn Fast trains leave Waterloo for Woking at 00, 09, 15, 30, 45 past the hour. Sorry for the problems
Network Rail have said that their new five year plan will deliver 20% more seats during peak morning hours into London.
London Tonight spoke to Tim Shoveller, Managing Director of Network Rail, about the problems they will have to confront whilst carrying out the building work.
Today Network Rail unveiled their five year plan to increase the "capacity and capability" of its services. London tonight spoke to Tim Shoveller, Managing Director of Network Rail about the proposed ideas.
The £120m Eurostar terminus closed more than five years ago. @itvlondon
Network Rail has submitted its plans for investment from 2014-2019 to the Office of Rail Regulation.
Its five year outline details the investment on the Wessex routes into Waterloo which will contribute to its plan to enhance "capacity and capability."
Their chief aim is to deliver 20% more seats during peak morning hours into London.
However the plan fails to detail any future for Waterloo International station which has sat dormant since Eurostar services moved to St Pancras in 2007.
Disruption on South West Trains between London Waterloo and Barnes, and between London Waterloo and Wimbledon due to signalling problem.
All trains to and from Waterloo are at a stand-still at the moment.