@ Erich: are you sure these Lancasters were against Feuersbrunn aerodrome? I also would be interested what the JG 301 did that night. Weren't they based somewhere in mid-germany that night?
@all: There is a St. Gotthard at the southern border of Austria/Slovenia that would fit to your describtion. Olt. Knieling (NJG 6), based at Steinamanger (Szombathely, Hungaria) was shot down this night in his Bf 110. All crew was killed.
Hope that helped some.
Regards,
Kurtl