I have re-reading Sharkey Ward book and found some interesting info about 8th june interception of Mazo flight by 800 Sqn.
According to Ward, he and Steve Thomas saw all the action. The fourth Shyhawk (Sánchez) would have jettisoned his fuel tanks over the eastern island of Choiseul Sound. They tried to chase him when were vectored to intercept three Mirage III that came from the west. According to him, that saved Sánchez to be shot down.
Mirage returned home when were close (15 miles) to them.
Regards all.