Passengers are being warned there's disruption on First Great Western trains between Exeter St Davids and Plymouth. A person's been hit by a train at Totnes.
Trains may be delayed or cancelled as a result of this incident.
Train services between Plymouth and Totnes are being disrupted while engineers are checking out a problem on the line.
First Great Western are organising replacement buses, but at the moment passengers are having to make their own way between the two stations.
Trains from Totnes to Plymouth are not affected.
It's hoped that the situation will be resolved by midday.
Rail passengers in the South West face travel misery over Christmas because of engineering works.
Services to and from Devon and Cornwall will end earlier on Christmas Eve - and some will be diverted causing long delays.
Passengers are advised to check before they travel.
Rail passengers travelling between the West Country and London Paddington have faced long delays after signalling equipment was damaged near Slough.
Three quarters of the trains running between Plymouth and Paddington were cancelled today.
Trains leaving Plymouth for London have been badly affected by the disruption, which has seen the usual 20 to 25 trains running on the line per hour be reduced to just four per hour.
There's major disruption on First Great Western services between Exeter Central and Exmouth due to signalling problem. All lines are blocked, with delays and cancellations as a result. First Great Western say they have no estimate for when a normal service will resume.
Cleaners on First Great Western trains are on strike for a fourth time today.
Members of the RMT Union are calling for the action in a row over pay and the use zero hour contracts by sub-contractor Mitie. The cleaners first went on strike in October.
The rail union the RMT has claimed today that the government's First Great Western deal will cost taxpayers almost £250 million.
The union says the extension for the West Coast mainline will only have around £30 million paid in premiums.
Premiums on the last 2 years of the previous contract came to £279 million, meaning the public could miss out on a quarter of a billion under the current deal.
FirstGroup's First Great Western train company will keep the franchise to operate trains from London to the South West for another two years.
The Department for Transport said it would last until September 2015.
Under the agreement, passengers will expect to see improvements to services including greater seating and sleeper carriage capacity and an improved wi-fi coverage.