BR Cravens DMU special 403 at Arrochar & Tarbet station. The date is probably 30 March 1959 when the Cravens units were brand new (it certainly still looks new!) as BR was running their Six Lochs land tours using DMUs in 8 car formation, often Met Cam but on this day an 8 car Cravens was used. Note what may be a tablet exchange platform on the left.

Photo: J.P. Wilson / Rail Archive Stephenson