Question about AFV names

[Bruce Parker (RIP)]

I'd like to pick the group's brains on WW2 Canadian/British armoured car names. It seems that tanks were universally given names based on their squadron (names starting with A, B, C, D and H for headquarters). Armoured cars seem to have similar names only rarely, the exceptions being Daimler scout cars at Dieppe and 4 Princess Louise Dragoon Guards Otters and Fox in Sicily. I can't recall ever seeing names on Humbers or Staghounds later in the war. Most restored vehicle owners don't seem to apply them.

What is the rule regarding Commonwealth armoured car names in WW2? If I had to guess I'd say they were used until some time in late 1943 when they were dispensed with.