Transport for London is asking people to avoid the Circle line this morning (October 13) as another signal failure has sent the rush-hour Tube system into chaos.

A failure at King’s Cross has caused delays across the same set of five lines that were hit last Wednesday. The problem is compounded by a lack of trains, which is affecting the Central line.

Again, Victoria station was badly hit with passengers unable to access the Underground with a defective train causing problems. Many were left queuing, the second day in a row the transport hub has been affected following a power cut yesterday.

The latest travel advice from TfL is:

Central Line: MINOR DELAYS due to a lack of available trains.

Circle Line: SEVERE DELAYS due to an earlier signal failure at King’s Cross. Please avoid using the line if at all possible. Tickets are being accepted on local buses.

Hammersmith and City Line: SEVERE DELAYS due to an earlier signal failure at King’s Cross. Please avoid using the line if at all possible. Tickets are being accepted on local buses.

Metropolitan Line: SEVERE DELAYS between Wembley Park and Aldgate and MINOR DELAYS on the rest of the line due to an earlier signal failure at King’s Cross.

District Line: Minor delays between High Street Kensington and Edgware Road

Last week, rail unions called for a summit, saying that "cuts" were significantly affecting the Tube network.