Southeastern Trains is reporting signalling problems between Dartford and Greenhithe for Bluewater, all lines are affected.
Services for these stations may be cancelled, delayed up to 30 minutes or revised at short notice. Rail replacement buses are on their way to Gravesend and Dartford stations.
London buses will accept Southeastern ticket holders on routes from Dartford to Lewisham. Southeastern high speed services between St Pancras and Faversham will call additionally at Higham and Strood where possible in both directions, non high speed Southeastern tickets will be accepted.
Following an obstruction on the line earlier between Deal and Dover Priory all lines are now open. Train services running through these stations are returning to normal but some services may still be delayed by up to 10 minutes at short notice. Disruption is expected until 8.30am.