Many thanks Gents for your replies.
Looking at Google earth it certainly appears the DL is in the area of the old Tiverton Junction station. Unfortunately the Google pictures also seem to show that some of the more accessible areas now have factories etc built on them so that access could well be restricted.
Rather than take a chance, I will stay in the Newton Abbot/Totnes area tomorrow and then make a visit to the Tiverton site to see if it is suitable for mainlne photographic use.
Once again thank you for your kind assistance.
Peter4447