Peter I have never seen any photos of Canadian troops arriving in the UK with No.4 Rifles. SMLE's are shown as still being on issue in Italyuntil early 1944 in some formations, others seem to have got No.4s by mid 1943. It's quite possible some Long Branch rifles were issued to Canadian troops either deliberately or accidentally. Someone better ask our remaining vets while there is still time.
Did you ever see any UK made No.4s with the C Broad Arrow mark?