The "SURREY", along with the "SUSSEX" was a post war conversion of the Number 4 Lee Enfield, done in England, by a "Trade" Gun Maker. Originally, it had the two piece stock, and was "sporterized" for civilian sales.
Elwood Epps, before the firm moved to Orillia, made several one piece stocked rifles using the Lee Enfield actions and barrels. The original serial number would have been marked on the left side of the butt socket, but that part of the rifle has been removed to utilize the one piece stock. The "BNP" along with the "England" and the calibre markings are from the rifle being proof fired at Birmingham after it was originally sporterized.
If the original rifle serial number was 7 C 1964, then it would have been a Savage made rifle.
If you post pictures of the stock, maybe with the rifle reassembled, then someone with an EPPS conversion could possibly help. Pictures of these rifles appeared in older Epps catalogues.