TOPIC:

Tony
It always helps for ID with pics as you have posted. The knox form of the barrel is marked with an "E" ( meaning the bore is rifled on the Enfield pattern) and the crossed sceptres surmounted by a Crown and VR are typical manufacturer's proof marks of that era. The other stamping; "Crown over BM" is an unusual one and I had to look it up. My reference shows that stamping denotes a Birmingham mark for special definitive proof of rifle barrels class 10. In other words, the rifle passed out of military ownership and was proofed for commercial sale. By the different clarity of the two stampings, it is clear that the "Crown over BM" was applied later in the life of the rifle. The presence of that stamping strengthens the earlier "could" about commercial sale.
Unfortunately, I can't help with the unit stampings on the butt tang. I will throw that one to one of my collecting colleagues who revels in that sort of thing.
Regards
IL.

Thanks very much for the most recent reply to my query on the origins of my .303 rifle. I've attached a new photo of a stamp I had overlooked on the butt of the rifle. Wondering if this helps any further. Cheers, Tony

M&D is a Canadian government stamp, so that's who used your rifle. BFA will be the unit; now, usually ...FA is ...Field Artillery, as in RFA = Royal Field Artillery, but I can't make BFA fit anything.
Might I suggest you post your questions on this forum:
www.tapatalk.com/groups/britishmilitariaforums/
There are a lot of wise collectors there, and plenty of Canadians.
Your rifle was made by LSA, the London Small Arms Co. That LONDON in a roundel on the butt is their stamp. Can you send a photo of the markings on the wrist which you see when you lift the bolt?