Thanks to Chris at the British Forum here's some more information. I've paid and downloaded his M.I.C. Enjoy Medal card of Cooper, Robert Corps Regiment No Rank 2nd Railway Supply Detachment Army Service Corps T/22885 Driver 2nd Railway Supply Detachment Army Service Corps T/22885 Acting Staff Sargeant Young?s Army Service Corps 1902-1918 lists two mentions of Railway Supply detachments. The first, on pg 38 notes that Nos. 1-8 Railway Supply Detachments were added to the ASC order of battle in 1912. The second, on pg 51, notes that 1-8 Railway Supply Detachments were in the initial ASC deployment to France in August 1914. Doc