This is going to sound a wind-up unless you have knowledge of it; In 1962 the Royal Marines provided drill instructors for the army. Background to it was that the ending of national service and the need to maintain the strength of BAOR meant that there was a shortage of Sgt drill instructors in the corps within the army. The only instance that I am aware of was two RM Sgts training recruits at the Royal Signals Depot at Catterick. There may have been others but I don't know. It lasted only about six months or so until the regular army drill/recruit instructors were up to speed. I'm certain that it happened, does anyone else recall it happening?