Some Chiltern Railways routes have been affected by flooding following heavy rain yesterday and overnight.

Trains are forced to run slower than usual between Banbury and Bicester North on the Mainline.

Northern line passengers have been warned of severe disruption after a signal systems failure.

Part of the line has been suspended and there is no service between Edgware and Camden Town while the rest of the line has severe delays.

Passengers can use valid tickets on London Buses and Thameslink.

Storm Bert has wreaked havoc overnight across the rail and road networks, including on the Great Western Railway routes which have been flooded.

Passengers have been advised not to travel on the following routes.

• Penzance to London Paddington
• Newport, Bristol Parkway to London Paddington
• Bristol Temple Meads, Swindon, Reading to London Paddington
• Worcester to London Paddington
• Exeter St Davids to Okehampton and Exeter to Barnstaple

A faulty train is causing severe delays between Tower Hill and Upminster eastbound only.

This is because of a faulty train at Temple, the latest TfL travel status update shows.

The rest of the line has good service.

Damage to the overhead wires between Broxbourne and Stansted Airport and Audley End means trains are unable to run and they will be cancelled.

National Rail said the disruption is expected to last until about 2pm.

It told passengers not to travel between Broxbourne, Stansted Airport, and Audley End.

National Rail said: ‘Owing to multiple fallen trees damaging electrical overhead wire between Broxbourne and Audley End, train services between London Liverpool Street and Stansted Airport are subject to severe delays, alterations and cancellations.’