The Jaguar was a GR.1 XX963 which was shot down on the 25th of May 1982 by a Phantom FG.1 of 92 Squadron. There was a breakdown of procedure which allowed the Sidewinder launch.
Regards the Harrier GR.5 incident - there was never a conclusion reached as to the exact reason for the accident. There were modifications carried out to the seat prior to service introduction.