A signal fault at London Victoria was affecting Southeastern lines, caused major disruption for Kent’s rail passengers on Sunday.
Severe delays and cancellations to and from London Victoria began shortly before 06:30 GMT due to multiple faults and engineering work.
Southeastern said its services resumed at 17:30 but added that services remained disrupted across its network and could be cancelled at short notice.
Dartford, Sevenoaks, Tonbridge, Ashford International and Dover Priory routes were all affected by the line closure.
Trains from Dartford to London Victoria were being diverted to London Cannon Street.
The Sevenoaks to London Victoria line was only running to and from Orpington.
Tonbridge trains were stopping at Bromley South while the Margate line had an additional stop at Swanley.
Ashford International via Paddock Wood trains were continuing to run, however, Ashford International via Maidstone East was terminating at Swanley.
Southeastern said passengers could use their ticket at no extra cost on their high speed services as well as London Underground and London buses.
