From The Internet Movie Plane Database
David McCallum (Quint Munroe)
Suzanne Neve (Beth Scott)
Charles Gray (Air Commodore Hufford)
David Buck (Sqn. Ldr. David 'Scotty' Scott)
David Dundas (Flt. Lieut. Douglas Shelton)
Dinsdale Landen (Wing Commander Clyde Penrose)
RAF Squadron Leader Quint Munroe wrestles with the loss in action of his best friend Scotty, falling in love with Scotty's widow Beth, a top secret bombing mission for top secret Luftwaffe test installations in occupied France and more nasty surprises after the Gestapo captures a French underground member.
Pretending to be a german Messerschmitt fighter (a Bf.108 Taifun at most), it’s in fact a SNCAN Nord 1002 Pingouin post-war French production powered by Renault engine. The same airplane is used in 633 Squadron - IMPDb: Frequently Seen Aircraft.