On the 30th of May 1973 the First RAF Jaguar was delivered to the OCU and so began

[Rebus]

I was at RAF Leconfield in the 70's, with 60 MU doing Lightning Majors on F6's. Across the hangar they were doing a Mod's program on Jag's. The Jag was a pretty little aircraft and the Lightning made it look like a dinky toy but the Jag made the Lightning look prehistoric.