Mick, it is most likely Stuart Purves you are recalling. He was a builder at Claud Butlers as so many of the good ones were. His shop was in Streatham. I have only seen one of his frames and very nice it was too. I have a friend in London who may have a brochure. I will try to get a copy if you like. Clive Stuart was based in Liverpool IIRC.
Mark Stevens in Dingwall, Scotland
May the sun and the wind be at your back.