I've just remembered that many years ago when I was dealing in medals I bought a group of four, consisting of the usual three for WW1 and the RAF LS & GC with George V's head. The recipient's rank as impressed on his LS & GC was "Sergeant Major 1st Class". The ranks of sergeant major 1st and 2nd classes remained in the RAF until 1933 until they were renamed Warrant Officer(1st and 2nd classes).
I bet even Danny doesn't remember RAF Sergeant Majors
