A signalling fault has been causing major disruption at a busy train station in London.

National Rail confirmed on X (formally known as Twitter) that all services were disrupted at around 6.30am today (June 4).

The ongoing signaling fault is expected to cause major disruption to trains to and from Marylebone until 3pm.

In an update at 12.30pm, Network Rail said that all lines at Marylebone have reopened however commuters are being urged not to travel on the Chiltern Railways network.

Whilst service recovers, trains running to and from the station may still be cancelled and severely delayed by up to 60 minutes.

Commuters have been advised to check before they travel and to find alternative routes where possible.

Major disruption has also hit services between Watford Junction and Euston.

All lines have reopened, but trains may be cancelled or delayed by up to an hour until 3.30pm, warns National Rail.