There are delays on South West Trains between Salisbury and Exeter St Davids after an earlier signalling problem.
Disruption is expected until 6.30pm.
More top news
A shipment of humanitarian aid is on its way to help Syrian refugees, thanks to donations from across the Westcountry.
Rain to start the working week. Winds easing and turning warmer
Rain early on Monday. Brightening up and feeling warmer in the lighter winds