FEWER trains are running on the Gatwick Express this morning following a low speed collision between two trains at a depot.

Southern services in the London area are also expected to be affected.

It could also mean other trains do not run with the usual number of carriages.

In a posting on its website, Southern said: "Earlier this morning two of our trains were damaged following a low speed collision within the depot.

"As well as these trains not being able to go into passenger service the depot is closed while this incident thoroughly investigated.

"During this time trains are not able to leave the depot to form passenger services.

"Many trains will be formed of fewer coaches than usual.

"Gatwick Express will be worst affected by this incident but Southern services in the London area will also be affected.

"This incident does not affect Thameslink services.

"Gatwick Express ticket holders may travel on Southern and Thameslink services between London and Brighton.

"Southern ticket holders can use Thameslink services between Blackfriars and Sutton/Wimbledon."