Andy
N3640 seems very much unlikely. This was a Short Stirling with 7 Sq and lost on a totally different date.
According to Shores P6950 was lost at this date (and he lists this as lost to Uffz Zickler, who seems to have held many ranks this date...
)
Shores also list a Hudon as claimed by JG 77 but none is known to have been lost.
Since you don't list your sources it is difficult to disect your information
Cheers
Stig