Hundreds of commuters have been left stranded at Canary Wharf station after severe delays on the Jubilee line.
There is currently no service between Wembley Park and Willesden Green due to a faulty train at Neasden, which is causing delays on the rest of the line.
Southern and Southeastern services are also suffering major delays at London Bridge and commuters are being advised to take alternative routes.
Earlier on 13 April, commuters faced major delays because of seven separate signalling failures on lines on the Southeastern network affecting services into and out of London. They were blamed on overrunning engineering works at London Bridge, which is currently going through a refurbishment.
People have taken to Twitter to vent their frustration.