12 o clock high was also shown at the RN School of Leadership and Management (at Whale Island) when I was a prisoner there. It is a good film.
Is it authentic? Who was it based upon, if anyone?
Twelve O'clock High was a fictional story (as was the bomb group portrayed), but was loosely based on a real bomb group and commander, with lots of actual incidents rolled into the storyline.
I watched something a while back where they discussed the real people that the movie characters were based on, but I don't recall details.