I came across a rather nice example of a mid to late 70's frame by the builder "Keith Coppell". Google turned up not much to go by, since i've never heard of him. The frame is very nicely made in a classic british lug style, with a fast back seatlug, and short campagnolo drop outs. Anyone familiar with the details of his work? City or shop association? I can post some pictures once I clean it up a little.