If you really want nitpicking, try the review in 'USA Today' which says,
"The trio of timelines can be jarring as you figure out how they all fit, and the fact that there are only a couple of women and no lead actors of color may rub some the wrong way."
I haven't seen the film yet, but I'm sure it would've been much better and more inclusive if the Spitfire pilot had been played by Helen Mirren or Beyoncé, instead of Tom Hardy .