Sorry about the late thread, is 667 the famous Victor that was so unreliable that the crew-bus would approach it from behind so it couldn't see them coming? My Dad is an ex-AEO (XV, 57 & 214) who I remember telling me of such a Victor. It had all sorts of problems including pressurisation problems and flew so infrequently that the tyres would flat-spot causing it to waddle when it was taxied.