The attack I am speaking of is on 12 january 1945.
16 Lancaster from 9 Sqn and 16 Lancaster from 617 Sqn all loaded with tall boy bombs made a sortie to the u-boat pens in Bergen. Escorte was by 315 Sqn. On the trip to Bergen the Lanc's where flying in loose gaggle formation and near Bergen tighten up the formation to get more bombers over the target on shorter time. On arrivel on Bergen the 315 Sqn was gone. Nobody saw them. Neither the bomber pilots or the German pilots from 9./JG 5. And they are not mention in any of the documents on the German side. I have talked to pilots on both side and they all tell the same story. No Mustangs.
Three Lancaster was brought down and several had to be scraped after arrivel to their homebase, due to heavy Flak and enemy fighters.
The Polish pilots was not especial popular by the RAF pilots
Best
Olve Dybvig
www.luftwaffe.no