From gwr.com:
Due to a wartime bomb near the railway earlier today disruption is expected until 14:15 06/08.
Impact:
Train services between Exeter St Davids and Barnstaple may be cancelled or delayed.
Customer Advice:
We're sorry for the delay to your journey today.
An unexploded wartime bomb had been discovered near to the railway line, this meant the railway line between Exeter St Davids and Barnstaple was closed for a time.
The British Transport Police have attended and deem it is safe, so train services are now able to run. There may be some further disruption as we recover the service.
We are trying to arrange for train tickets to be accepted on the local Stagecoach bus routes. If youd like to use the Stagecoach bus before this is in place, please purchase a ticket on the bus, keep it, and sent it, along with your train ticket, to us for a refund of the bus fare.
Stagecoach bus routes 5, 5A, 5B and 5C run between Exeter St Davids, Credition, Copplestone and Barnstaple.
We will update this message with more information when we have it.