I watched the first episode last night-- at least I tried to watch it, I really did. However, from the beginning things just jarred. For a start, the accents just weren't right, and I'm not talking about the US actor playing Winston. The Queen had a very distinct voice as a young woman, quite high pitched and very upperclass (naturally.)
I'm aware that plummy and cut glass accents stopped being taught in UK drama schools somewhere around 1975 but it's a problem I've noticed in other productions where younger actors in period TV dramas attempt to speak as the upper classes did generations ago. They usually make a valiant stab at it but sometimes it doesn't pay off and it didn't here, from the leads down. It was especially noticeable among the female actors. The actor playing Prince Philip wasn't too bad, though the timbre of his voice was very different to PP's.
I know this isn't a documentary. Far from it in fact. However, couldn't the casting directors have found actors that sort of approximated the likenesses of the people they were playing? The actor playing King George VI for example looked absolutely nothing like the frail looking King of the late 1940s/1950s. Princess Margaret was stunning looking as a teenager and young woman, with glorious eyes. 'The Crown's' Princess Margaret was drab and ordinary. Why did the actor who played Clementine Churchill, who wore her hair at that time in a very 1940's roll at the back, have a modern curly hairstyle?
As for errors, there were many. Just one as an example. No doctor, then or now, being issued into the presence of his sovereign, would have walked over to a desk where the monarch was seated and just sat down without an invitation to do so.
It's things like that, small things that would never have happened, that just irritated me so much that I switched off after a while. Sorry, 'The Crown' obviously had loads of money spent on it, but details matter. I won't be watching any more episodes.