My 2 favourite are both by J Blanch and Son (those who know my preoccupations will not be surprised!).
My hammergun is a 12b with 28" Whitworth steel barrels, 1/4 & 1/2 chokes and sadly a bit of a plank for a stock.

The other is the gun I inherited from my father (the one which got the whole Blanch thing started!), a backaction 12b with original Damascus barrels, same chokes as above. Both with crisp engraving and lovely actions.