South West Trains have asked passengers not to travel today - in an update on their website issued this morning. They say they will be operating a significantly reduced timetable all day.
The statement continues: "It is highly unlikely that trains will run before 0900 at the earliest and in some cases this could be considerably later. We have been running test trains this morning across our network and many have encountered fallen trees and debris on the line."
High winds mean they can only run trains at a maximum speed of 50mph, this is a safety measure in case of obstructions on the tracks. This will result in significant delays and in some cases these may take up to twice the normal time.
Maintenance teams are checking high-risk sites to carry out work to reduce the impact from flooding and fallen trees. South West Trains say extra staff are also being deployed at key locations across the network . Test trains will run during the morning to check routes are safe to operate.
The rail operator says the alterations to services are designed to maintain safety across the network, give passengers greater certainty on what trains will be running, and help avoid knock-on disruption.
Overcrowding on South West Trains could be reduced from today.
The first of more than a hundred new train carriages will come into service. It's hoped they will ease crowding on routes to Windsor, Reading, Wokingham, Bracknell, Ascot and Basingstoke.
There's disruption on South West Trains between London Waterloo and Southampton Central, and between London Waterloo and Salisbury after a person was hit by a train at Basingstoke.
The line is currently blocked and there's no estimate for when the line may reopen.
The incident is also affecting CrossCountry and First Great Western trains.
We are currently experiencing issues with our ticket machines across the network, engineers are working on rectifying the problem.
There are no trains this afternoon between Reading and Wokingham. A person has been hit by a train at Earley. More details here
UPDATE - Alton and Camberley line - Developments overnight mean the service on this route will be altered from that previously published.
UPDATE: Buses replace trains Alton to Farnborough and Guildford to Ascot via Aldershot. Mobile link with details: http://t.co/Plffrffe4p
South West Trains has announced its plans to stop overcrowding on train services across our region.
More train carriages, longer platforms and opening the old Eurostar Terminal are all part of the plans to increase capacity.
South West Trains are looking to increase capacity for almost 10,000 extra peak-time passengers on routes in and out of London Waterloo by 2019.
Transport Secretary Patrick McLoughlin said: "Britain needs a strong economy if it wants to compete globally and effective transport links are absolutely key to that. This is why the Government has embarked on one of the biggest programmes of rail modernisation ever"
The scheme between South West Trains and Network Rail looks to reduce delays and help improve rail services.Mike Pearse has given us exclusive access to speak to staff and passengers.
South West Trains and Network Rail have joined together as part of a major scheme to improve services on train networks.
They are the first company where the train operator and Network Rail have formed a joint operation to run the network as a single company.
For rail passengers delays top the list of passenger complaints but now a new scheme could help reduce the chaos they cause.
A new alliance between South West Trains and Network Rail is paying for extra transport police officers to drive emergency engineers to the scene of incidents with blue lights flashing.
The aim is if the engineers get there faster delays and frustration for passengers will be cut.
Our Transport Correspondent Mike Pearse was given exclusive access to join the new squads on patrol.