The Spitfire F.21 was the last Spitfire variant to be introduced into service before the end of WW2. It belongs to what we usually call the third generation of Spitfires, and the F.21 was the first of it, preceding the F.22 and F.24. This is a study of 28 pages, with 29 photos and 4 colour profiles, and details its carreer during and after the war.