Passengers are being advised not to travel to the country's busiest railway station because of a signal failure.

South West Trains said services across the whole of its network, including to and from London Waterloo, may be cancelled, delayed by up to 90 minutes or revised.

Disruption is expected until the end of the day.

A message to passengers said: "Our control room has confirmed that we have lost all signalling in the Earlsfield area and are not able to run trains into London Waterloo.

"Due to the location, this has taken place our ability to run a train service this morning has been severely hampered.

"Our engineers are on site and are working hard to restore the signalling so we are able to run trains.

"We strongly advise you not to travel towards London Waterloo. If you do travel, please consider alternative arrangements and use other train operating companies.

"A queueing system may be implemented at your local station to help us get you to where you need to go safely.

"Some trains that commenced their journeys before this incident occurred, may be altered or revised at short notice. Some trains may also be diverted via an alternative route."

mfl