We have been informed of disruption to travel this morning affecting passengers travelling to Gatwick and Heathrow airports. Heathrow Express services are currently suspended.
See the statement on their website for the latest information.
Trains from Brighton to Gatwick have also been severely disrupted. A major signalling problem is causing disruption caused by an overnight fire, which has affected electrical cables and a lineside signalling equipment cabinet. A limited service is running from Brighton, causing delays of up to 90 minutes. For further information please refer to the National Rail website.