Robert
The Münster area was 56 Sq standard patrol area (or one of them). On the 28th of November they DID claim a He 219 as well, but that time by F/Lt Moore
Since I don't have the book you refer to, I would be very interested to find out the night losses listed for either 16/17 November or 17/18 November.
However checking Balss book a bit more careful he DOES list a loss on Dec 18th! In fact he also lists the time as 06.50H. Foreman gives no time for the mission of 56 Sq but Shores does and to my disappointment it says 14.15H, which of course makes it unlikely that it "only" could be a discrepancy of a single day.
I am also a bit puzzled by the fact that Foreman in HIS book indicate that the sweep made by 56Sq this day and with their claim of the He 219 was their FIRST one of the day, while Shores in his 2nd Tactial Air Force clearly indicates that this was their SECOND sweep....
Cheers
Stig