The Circle line remains suspended this morning while TfL fix the collapsed drain on the track at Baker Street.

The issue has also caused part suspensions on the Hammersmith & City line between Edgware Road and Euston Square, and on the Metropolitan line between Baker Street and Aldgate, with severe delays on the rest of those lines.

Meanwhile, there are still severe delays between Abbey Wood and Heathrow Airport & Reading on the Elizabeth line following a late finish of engineering work at Westbourne Park and an earlier customer incident.

There are also minor delays on the Victoria and Central lines due to train cancellations.

There are minor delays on the Victoria line due to train cancellations.

The Central line is dealing with some minor delays due to train cancellations this morning.

This is affecting the line between North Acton and Ealing Broadway & West Ruislip, and between Leytonstone and Epping &Hainault via Newbury Park.

There is still a good service on the rest of the line.

The Elizabeth line has reopened between Paddington and Heathrow Airport & Reading; albeit with severe delays, following the earlier customer incident and the late finish of engineering work at Westbourne Park.

Due to the ongoing disruption, tickets are being accepted on London Underground, Great Western Railway, South Western Railway, Chiltern Railway, DLR, Southeastern and Thameslink.

There is a good service on the rest of the line.

Service is improving on the District line - there are now just minor delays between Earl's Court and Ealing Broadway & Richmond while TfL fix the collapsed drain on the track at Baker Street.

The issues at Baker Street have been caused by a collapsed drain, according to TfL.

Teams are on site trying to fix the issue, while a number of Tube lines remain affected.

The Circle line, and parts of the Metropolitan and Hammersmith & City lines, remains suspended, while there are severe delays on the District line.

We will keep you updated as soon as service changes.

Train crew being delayed between West Ealing and Greenford means that trains are unable to run between these stations.

Some trains will be cancelled, with disruption expected until around 8.15am.

This is affecting a number of Great Western Railway services this morning.

There is currently no London Tramlink service between Beckenham Junction and Harrington Road due to a signal failure in the Harrington Road area.

There remains a good service on all other tram routes.

According to TfL, the issue at Baker Street is with track drainage.

TfL engineers are currently on site assessing what has happened and working out a plan to resolve it as quickly as possible..

There is no current indication that the damage was done by anyone maliciously.

There is no service on the Elizabeth line between Paddington and Heathrow Airport & Reading while emergency services deal with a casualty on the track.

There is also no service between Paddington and Abbey Wood following a late finish of engineering work at Westbourne Park.

Tickets are being accepted on London Underground via reasonable routes.

There is a good service on the rest of the line.