I saw this film at TIFF on the big screen and loved it. There's not a weak member of the cast. I really loved the way the photography reflected the sense of gloom that would have been felt by the people facing a new war. Big thumbs up, gives a strong sense of the time and place.
I have no idea why people are raving about this film, it's a bit crap, it's probably Oldman weakest performance to date, and the cinematography is terrible. Churchill with Brian Cox in the lead role is a FAR superior film on the subject.