Airfix has never released a 1/32nd Spitfire.
If the box says "Airfix", grab it. They have done Spitfires I and V in 1/24th. They are working their way through the Spitfire/Seafire line in 1/48th scale. Two weeks ago, I picked up, all in 1/48th scale, a Spitfire I which includes parts to build a very early Spitfire with the two bladed prop, as well as a Spitfire XII and a Seafire 46/47. I have hidden them from my dearest because although she is a lovely woman, (who has abysmal taste in men), she probably wouldn't take the time to differentiate between Spitfires and Seafires. She would just see three models of the same aircraft and start organizing the firing squad, or jankers at best.