Looks like a Beesley Best to me. The "fern" chiseled fences, although used on some early Beesley Pat. Purdeys and others, was a Beesley signature for most of his production. The stocks ,however are new to the gun. The wood, comb, checkering, and what I can see of the general shaping are not quite "British". The numbers on the loop are Whitworth tube #s as has been speculated before. Theese #s are on most Whitworth barrels weather chopper lump, or dovetailed from about 1880. The "sheaf of wheat" logo does not appear on many whitworth bbls. The tube #s will be on all except for very early ones. It's too bad the work was not done a bit better, but it looks as if this gun could be saved with a good re-do of the stock etc. as long as the bbls are good.
All the best, Mal