The role of the press
I just saw this film for the first time and was very impressed, especially with the performance of the great Helen Mirren, adding another feather to a very distinguished cap.
I still remember the events following Diana's death and the almost hysterical response of the British public. My impression at the time was that it was fueled by the tabloid press, a thoroughly ignoble institution that achieved new depths of cynicism in its coverage.
Watching The Queen, it seemed to me that the film did an excellent job of showing the escalation of the manipulation of public emotion from day to day, though it's quite possible that I noticed it more than the filmmakers intended, just because it confirmed my own recollections.
It makes me a bit uneasy to think that voters who decide who holds the reins of a nuclear power are so easily led by the nose.