Thanks for the replies guys, it's much appreciated. I have seen pics that look like a tombstone, I've seen pics that look like a shaped background so I am going to message the regiment and enquire with them. I know the tombstone was worn on the blue beret as I've got one in the attic.
I asked someone who was in the RWY around the time it changed and he said he had a backing resembling the shape of the badge sewn onto the black square on the brown beret, but having seen both described I will make the enquiry to find out for definite
Thanks again, Bill