Thanks Jim,
I will check the ORB of 227 Sqn to see if the Ju 88 claimed in the morning of 30th was a "sure kill" or not, but seems everybody except Brian Cull's book put the loss on the day before.
As for the other Ju 88 claimed by GC 2/7 off Corsica you 3.(F)/122/1.(F)/33 loss could be the one. Missing with whole crew fits with what French pilots report and both units were in S France and could fly in Corsica area.
They are not liste in MAW4, nor in the (F)/122 history available online:
https://www.luftwaffedata.co.uk/wiki...._122_Oct_1943