I'm sure someone with access to the Internetgun club site will weigh in with all the necessary information. True Tolley was mainly associated with wildfowling guns. They were later bought out by Skimmin & Wood and I now think that Wisemans in Birmingham have the name. I have a boxlock non-ejector 12 bore wildfowl gun and a Tolley box lock ejector from their S & W days but made as a lightweight 2" chamber gun. Yours does have the look of a W.C.Scott gun about it.

Just the sort of gun that I try to pick up. They are not making any more! Enjoy using it. Lagopus.....