Michael111 - Diamonds in the Sky was presented by Julian Pettifer and first appeared in the late 1970s. It was repeated again a couple of times, but would be seriously dated now - Freddie Laker had a starring role in one of the episodes, as did Dick Ferris, the former CEO of United.
Surprised no one has mentioned Airline as one of their favourites ... nope, not the Orange crowd; the one wi' t' Yorkshire lads (headed by Jack Ruskin, played by Roy Marsden) and their DC3s!! Apparently, this was a semi-biographical thing about a combination of the Keegans and Laker.
Oh, and don't forget Buccaneer either, which was a very biographical series about Redcoat (cunningly disguised as Redair in the series) and their Britannias...