F-5 Aggressors
I remember speaking to a Navy Test Pilot a few years after the Falklands War - he mentioned that he with a Seajet " could just about hold off an F-5, but get marmalised by anything like an F-16 "
Of course that was before BVR AMRAAMS came into the equation; ironically he was on the first FRS2 ( as then ) trials when speaking !
So the theory of our lot playing with F-5 Aggressors at some stage sounds right to me.