603 Squadron Spitfire losses 7 October 1940

[AndyMa]

Gents,
Thanks for the inputs. So it would seem that K9807, K9963 and N3109 were the three aircraft involved.
However, it is still not clear to me which loss was which.
One of the links states:
"Air81/3656 has - Sergeant J M Strawson: injured; shot down, aerial combat, Spitfire N3109, 603 Squadron, 7 October 1940."
We now know that this cannot be correct. N3109 was excavated in Kent, and was the aircraft flown by F/O Matthews. Strawson crashed into the Thames Estuary and was lucky to escape with his life after having difficulty getting out of the aircraft as it sunk.
The obvious answer would be that the pilots' names in two losses on 7 October (K9807 and N3109) were reversed. That said, "The Greatest Squadron of Them All" maintains that Morton was flying K9807 when he was shot down on 5 October.
An interesting conundrum...