Hi Ben, Your Long Branch is as said, Canadian made but its been in British service as indicated by the remarked serial number on the side of the body. Its also a Ex RAF DP rifle, do you have a deac cert with it? Not many of these Ex RAF no.4 rifles made it onto the market so its a good find. This version of DP No. 4 rifle was replaced with the L59 which was significantly more weakened to prevent them being used by terrorist organisations.