I must say, although Ms Mirren was absolutely superb, I found this is a very dissapointing film, even to the extent of which I found it in the realms of a made for tv movie.
The use of real footage of Diana and the newsreaders confused the film further as I found the other actors playing the Royals actually unconvincing and worse still, hard to recognise. I found I could only work out who they were supposed to be because of the sterotyped situations they were in.

The grinning Blair is constantly annoying.

Another actress playing the Queen in this film would have made it a turkey for me.