I believe the action at least was made by Westley Richards.I owned a 12 G by T.Wild that was built on the same Westley Richards Action. The action flats on this gun were stamped Anson and Deely patent.It would not be unreasonable to assume that W.R. was selling actions, "in the white" to the trade;the price of which would include a royalty.Pages 68-69 in the book the, "British Shotgun Vol;2", by D.J.Baker and I.M. Crudgington, shows illustrations of the A&D patent in various forms. The pin holes in the side of action of your gun are in the same position as the action illustrated.