Around the time Carlton became part of the Raleigh company, they made their own lugs. The Carlton-made lugs had names, and were used on bike frames with the same names. A famous example is the Capella, originally a Carlton model in the early 60's, but familiar to more forum members because many years later they decided to use up the old stock on Raleigh International and Super Course frames.

I vaguely remember that Cresta was another of these lug designs. Or am I thinking of Crespera or something? At any rate, the lugs I'm thinking of were originally used on a Carlton frame, and later became characteristic of the Raleigh Grand Prix.