can anyone please tell me if british WW2 ARMY OFFICERS ever wore trade badges on their uniforms ? ( - example sniper, bomb disposal, driver etc ? ) and did a officer change cap badges on their uniform to general service officers cap badge & dog collar badges whilst awaiting re-posting of a command from one regiment unit to another or was the officers general service cap badge just for NEWLY commissioned officers out of officer training school who was awaiting assignment to a regiment ?