Hi Again
There is some info on the Golden Arrow here (see
http://www.goldbeach.org.uk/yservice/Golden%20Arrow.htm ) the tractor units are certainly OX's , however I wonder that if this was sent out as a complete unit it also included the support vehicles for the 22 man crew. This may well be why some OY's came with it. Wonder what happened to these units after they left the military.