Maybe I'm insane - and NO, I don't have a film. I float this just to see if it's happened to anyone else.
Yesterday afternoon, I approached a solo low Lancaster. It was the third of a box - the other two got blown away by some unlucky compatriots who paid the price for their attacks. This I saw happen as I approached the box. I noticed, as I approached, no identifying icon. This remained true even as I got close enough to see the remaining Lanc. As I got close to it, I made a slashing firing pass and several hits. Normally, in a Spit VIII, I could do this with impunity by rolling and yawing as I came in. However, this Lanc put me down hard, as if hitting me with 20 mils, and blew my wing off quickly.
I never saw an icon - and even more oddly, I never got a message of who shot me down.