As Dale guessed, these frames were built in Scotland, by an engineer called John McConnell ( I think that is correct..or something very near). Later he moved south , to the north of England and set up a workshop near Whitby on the east coast.
John started building in the mid-to-late 70s..I think.. and rapidly built up a very sound reputation for quality accurate frames, probably based on his claim that his engineering background ebabled him to build to within .oosomething of an inch. Most of the production was of the "club" type bike, and most of the ones I have seen have either Nervex Pro or Prugnat long point lugs. Fork blades and seat stays are very much *old fashioned in shape and dimensions.
I suspect that you could respray a Wester Ross and add Flying Scot decals...and no one could tell the difference. Some of his frames owe something to the lugged frames of Jack Taylor..that sort of British tradition. The company did not last long but its reputation still stands proud; the production was small, as I gather, but of lasting quality.
There is a Wester Ross frame within 100 yards of where I am sitting to type this email. It belongs to a friend and member of the Settle WorldWideWheelers Club. Painted in deep blue enamel, it has white decals and lug-lining...very simple and understated. The d/t lettering is simple copper-plate style. I will try to get photos.
Wasn't there a website in the UK produced by two brothers that had a section on Wester Ross? Closed down recently or so I think I read on the List?
Norris Lockley...Settle Uk