Trains travelling to and from Charing Cross can not stop at a train station after a power cut.
Some Southeastern services can not stop at West Wickham following the power failure on Sunday night, which has continued to cause issues throughout Monday.
UK Power Networks have said the power will be restored by 7pm. National Rail has said there are no trains expected at West Wickham until around 7.45pm.
Earlier on Monday travellers faced delays to Heathrow Airport on the Piccadilly Line while Transport for London fixed a signal failure at Arsenal.