Great Western Railway (GWR) is warning commuters the line has been blocked and train services to and from Exeter St Davids and Barnstaple may be cancelled or revised. Travel information online suggest the disruption is expected to continue until at least 6pm tonight. A GWR spokesman said: Due to a line side fire earlier today there are currently no services between Crediton and Barnstaple with a replacement road service operating between these stations. A shuttle train service is operating between Exeter St Davids and Crediton. This disruption is expected to at least until 6pm and replacement road transport is in operation between all station. It is thought the fire involved railway equipment and the cause is being investigated. For the latest travel updates go to the GWR website . Check back for more information as we have it.