An army of workers will move in to work on Reading's rails - 6, 000 hotel rooms have been booked over the week to accommodate them.
The cold weather meant more misery for rail travellers today with serious disruption on a number of key commuter routes.
Network Rail is to spend £38bn nationally on improving the railways. The Thames Valley area alone is to receive £9bn in investment capital.
We have been treating the third rail in the south of England with anti-icing solution and trains were running around the network overnight to keep the rails clear of ice as much as possible.
Additional people were used on the ground to respond to incidents and carry out regular inspections of the infrastructure.
We will continue to work closely with train operators throughout today to deliver the best possible level of service and apologise for any disruption caused to passengers.
For the latest information, passengers should check with National Rail Enquiries or their train operator before travelling.
The scene in Alton this morning after a series of rail delays has left commuters stranded. Many say they've now decided to work from home.
Services on parts of our network are being disrupted this morning as a result of adverse weather conditions which have also affected other train operators.
Cold weather conditions have caused a build-up of ice on the conductor rail which is used to power our trains.
When ice forms on the conductor rail it affects the power supply to trains and services are prevented from running normally.
As a result there are delays to services across some parts of our network. Services between Havant and Guildford are currently subject to delays of up to 60 minutes.
Trains between Waterloo and Reading are currently delayed by up to 30 minutes. Trains operating between Ascot and Guildford may be delayed by up to 40 minutes while services between Farnham and Alton are suspended.
We would like to apologise to customers for the delays to their journeys this morning.
Delays of up to 15 minutes on South West Trains between Portsmouth Harbour and Guildford due to poor rail conditions at Havant. Tickets being accepted on local bus routes.
All lines in and out of Portsmouth Harbour are now open, however services may still be delayed. Also affecting Southern. First Great Western are now running normally.
Delays of up to 40 minutes on South West Trains & First Great Western & Southern between Southampton Central and Fareham due to earlier broken down freight train between Swanwick and Fareham.
Trains can now run but residual delays remain. Delays are expected to continue until around 3.20pm.
Disruption on South West Trains between Alton and London Waterloo due to emergency engineering works between Alton and Farnham.
Services are running from Farnham to Waterloo, with an hourly rail shuttle service running between Alton and Farnham calling at Bentley. Taxis are also supplementing services. Disruption is expected to continue until 12:00.
Disruption on South West Trains between Eastleigh and Romsey due to signalling problem at Chandler's Ford. A taxi shuttle is currently running.
We are now unable to run between Virginia Water and Weybridge. Taxi's are being arranged to run on this route.From @SW_Trains on Twitter: