Meryl Streep plays Margaret Thatcher to perfection in 'The Iron Lady'

Meryl Streep, portraying Margaret Thatcher, is wearing a wig of what looks like beautifully coiffed, blonde razor wire. She purses her lips, and casts a steely glare around her Cabinet.

It’s a moment that demonstrates her dominance of her ministers.

At least that’s the idea, in this exclusive shot taken from the film The Iron Lady, which goes on release here on January 6.