Yes pjac is correct. Bristol built the Proteus.
The Bristol Siddeley Proteus was quite an engine, powering the Saunders-Roe Princess flying boat, RN patrol boats, a frigate, a hover-craft, and even Donald Campbell's Bluebird land speed record car.
The Britannia entered airline service in 1957, so I would say 1958 is still early in the aircraft's career.
Last edited by evansb; 14th Feb 2009 at 01:04.