There are severe delays between Waterloo and Canary Wharf on the Jubilee Line due to signal failures at London Bridge.
There are also severe delays reported on the Docklands Light Railway.
The rest of the line is operating, but with severe delays, while trains on the Central Line and Waterloo and City Line are not stopping at Bank to prevent overcrowding.
As well as all that, there are minor delays reported between Surrey Quays and Highbury and Islington.
Check out tfl.gov.uk .