Dunkirk

I was pretty impressed. When i saw it, I thought it was the best CGI I had ever seen. Upon returning home I did some research, 3 flying Spits, the "Me-109" Buchon and a camera plane. The He 111s, Stuka's and other aircraft were RC models. If you don't watch it as a documentary it's pretty good. That being said, on the first shot of the Spitfires, I started asking myself if they had Malcolm hoods that early in the war. And the Blue Ensign on Moonstone, was it Royal Navy Reserve or "defaced" and representing the Royal Yacht club?
No oficial word on that.
Lou