Wedge Hat versus Beret

[Garry Shipton (RIP)]

I think this question is for Mark Tonner

In photos that I have,the D-Day Dodger is wearing wedge hats in the Uk.Then ,I have one of those beige colorized photos from Italy dated 1944/45 where he's wearing a Khaki shirt with his RCASC shoulder flashes.and,wearing a black beret with the RCASC hat badge.Next picture is from after war's end,in Brussels,where he & three others are pictured joining the Royal Canadian Legion,And,what is he wearing,a wedge hat!!Was there any regs for headress cover from your volumes of DND WW2 info i.e.-wedge versus beret??