If anyone is interested, there is an extremely good doco on Netflix about the evolution of the Spitfire, "Spitfire: The Plane that Saved the World". It was produced in 2018. The Spitfire is hands down my favourite aircraft of the Second World War and although I've seen just about all docos regarding this beautiful aircraft, including hours spend at Dunsfold Aerodrome War Museum in the UK as well as Duxford and airshows at Farnborough, there are some interviews from pilots that haven't been previously aired. The last 20 minutes brought a tear or two to my eye. My mother married one of the engineers who helped design the elliptical wing. I remember when I went to the UK when I was around 15, seeing all the model aircraft and a Schneider Trophy that sat pride of place on my step-father's desk - influential in the precursor Supermarine Spitfire. Probably the reason for my love of the Spitfire. It was through my step-father that my mother met Douglas Bader. I still have an old black and white photo of them together on the wing of a Hurricane (I think, from memory), as well as a separate photo of Bader. Anyway, if you're interested in military history, definitely worth a watch.