Well, it's a typical school case and as you say it will probably be impossible to find out who shot down who that night. I also have 7 abschüsse , the germans considered a abschüs valid when an aircraft was seen falling down in flames. Seeing it crash was a confirmation. Therefore a crippled bomber that sometimes managed to return to its base and was written off later was considered as an abschuss. So did you check if any lancs were damaged beyond repair? this could account for number seven. The claims I have are all South of Düssledorf. If it's impossible to state who got such or such lanc, you could eliminate those who could not have been south of Düsseldorf (both Lancs and nightfighters) this will leave only a few potential candidates. Then by checking geographic locations some of them may have been around only for one kill before leaving the zone (short time frame) . It is highly probable the Wilhelm followed the stream at sight. He got his aircrafts between 19.25 and 19.37.

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