I think it is very undesirable to allow Americans to play the parts of English people. They simply cannot do the accent and it destroys the credibity - what thespians call"the suspension of disbelief". Streep is widely regarded as a master of accent but the trailers I saw of this film made me wince. Not quite Dick van Dyke, but bloody awful accent stuff.

But in any event I would not watch a film about the bitch Thatcher - unless it was one of her being burned or boiled alive - or maybe when her complicity in the greatest frame-up on British history comes out, being posthumously stripped of her honours, disinterred, and her body thrown to carrion birds.