I know that this may sound trivial but why was R S M Cameron refered to as Sergeant Major when as a W O 1 he would have been refered to as Mister by the Officers and Sir by the Other Ranks,just a thought but from my service days this was the norm,I would welcome any views on this subject.
I am wondering if this was for the layman's benefit, to help the average viewer discern who was ranked above others perhaps ? I, for one, would not have the knowledge that you have and would never have questioned the calling of him as a Sgt. Major. Then again, i'd rather they had been more factually accurate with these things as it should be.