Wrapped No4's don't all have Britishproof marks. I have unwrapped two, a UF and a PF series. Both had the wrap cut to allow import marks on the end of the barrel(CAI) and cut open to verify serial number at receiver. There are NO PROOF MARKS on the rifle in any location.
How many others are like that?
Is there a book that claims the UF rifles are Irish Contract??? I thought it was the PF309348-PF359347, made in 54 and 55.