Steve,
Here is the link to the Ebay advert;
http://www.ebay.co.uk/itm/321592740569?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D321592740569%26_rdc%3D1
These vehicles were supplied to the Army with the Perkins Eagle 350, which was an improved design of the Rolls Royce Eagle, Perkins having taken the RR Diesel business over.
regards, Richard
Thanks for that Richard, looks like the civvy version then,although still a great truck no doubt.