Ben,
No, I can't explain it, but the RAF might still have archived authorisation sheets, detailing who was flying where on that day. It's probably a vain hope after all this time. Although I know that used auth. sheets were retained by all squadrons, I can't remember how long for and I'm not sure if the data is in the public domain, if you know what I mean.
But I'm not sure what the relevance of another aircraft would be.
