see.... kind of gone off the subject yet again...
From Wikipedia at
http://en.wikipedia.org/wiki/Dartmoor_Railway under their
free documentation license - page dated 29th July, so I'm sure there are some useful additions ... I'm offering this as a starter to get us back towards the right tracks for this thread.
Dartmoor Railway closed on 18th April 2008, as the operating company, ECT, decided to pull out of railways. The passenger and maintenance operations of the railway have now been put up for sale. Freight operations over the line continue however, as the route itself is owned by Aggregate Industries who maintain a railway ballast quarry at the head of the line.
The railway was unusual amongst heritage lines, as a public service is operated from Exeter to Okehampton during the Summer, by First Great Western. The line also has an as required freight service that carrying ballast from the quarry at Meldon onto the main line.
Devon County Council are running the Sunday Explorer trains between Exeter & Okehampton, every Sunday from 25th May to 21st September, during 2008. The five return trains will be run by First Great Western on behalf of the Council, according to the Council's website, and there may also be some basic facilities at Okehampton station, run by the Friends of Dartmoor Railway.
See also
http://www.firstgreatwestern.co.uk/Content.aspx?id=2569 for
FGW▸ 's page on the subject of their summer trains on the lines, including fare options which I know I have already seen discussed on The Coffee Shop