Services to and from London Marylebone on Chiltern Railways were suspended on Tuesday 4th October 2016 after signalling cables caught fire.
The fire broke out approximately 4.00am in signalling cables on the Kilburn viaduct on the stretch of line between Neasden Junction and London Marylebone. Data and signalling cables were destroyed in the blaze.
Firefighters were still damping down the affected cables at 8.00am. Repairs are likely to take 24 hours to complete.
During the closure of the line into London Marylebone an emergency timetable ran northbound from West Ruislip while Chiltern Railways tickets were being accepted by Virgin, London Midland, CrossCountry and GWR.
Disruption to services is expected to last throughout Tuesday 4th October 2016 however services are expected to resume with a normal timetable on Wednesday 5th October 2016.
Passengers are advised to check before travelling in case there are any changes. Services may be shorter and busier than usual as trains will be out of their normal positions.
The cause of the fire is not clear at the current time.
Further information can be found on the Chiltern Railway website.