Any gun imported into Britain that was not Proofed would have to go through one of the two Proof Houses before it could legally be sold. So, the Proof marks don't alway correspond to the country in which it was made; although they are a reasonable indication in most cases. For example I have an Ithaca pump action with London Proof marks and an L.C.Smith with Birmingham marks. Neither made here. The gun looks like one that was made in Belgium but imported part finished and proofed here. Guns like that do turn up and can have all sorts of names on the top rib. It could have been made in Belgium then imported into Britain where it was engraved, hardened and the barrels browned; sent for Proof and sold on. Not an uncommon practice with lower value guns. Lagopus.....