As originally practiced, browning would have yielded a "black" type finish. Some of the modern browning solutions seem to offer what can only be described as a false patina. The breech block on the Martini Henry rifle was browned, and mine, which was made in 1878 shows a dark blue finish.
Incidentally the German word for bluing is brunnierung, which translated is "browning". I think the original process of browning is alternatively called rust bluing.
The South of England has 2 good things, the M1 and the A1. Both will take you to Yorkshire.