World on Fire: The ULTIMATE Series 1 Recap 💥 | BBC (September 1939-July 1940)

 Wiki here

Three young people are in the eye of the storm as World War II explodes around them. Nothing can survive unchanged. Not even love. #WorldonFire #iPlayer

I haven't watched this but I hear good things about it. I believe you can watch it no Netflix too. 

Battle of Britain trailer (1969)

 https://youtu.be/4d86cHhp65Y

Probably the best film for this period. This DVD I have and you can pick it up cheaply.  Chances are you have seen it but if you haven't.... film wiki

Hurricane Aces 1939-40

 I picked this Osprey 2nd hand. Looks good.