Hei Mikkel
I have now looked into the lists of Scandinavian pilots who were trained by the Norwegians in "Little Norway", Canada. I can confirm that F/L Paul Henrichsen indeed was not sent to this school before joining 332 SQN.
I have heard, unconfirmed, that he before joining the Norwegians was promoted to F/L in a RAF fighter squadron, most likely flying Spitfire. Who I do not know.
This day 14./JG 26, with Uffz. Rey was looking for fighter-bambers when they were attacked by 25-30 Spitfires probably near Dortmund. Uffz. Rey claimed one of them but lost Uffz Friedrich in this air combat. The Norwegians reportet no contact with the Jagdwaffe this day so you can rule out Uffz. Rey. See War Diary JG26 by D.Cakdwell.
I also very much doubt the JG 27 claims had something to do with F/L Henrichsen.
Regards
Knut Larsson
www.rafandluftwaffe.info