Meryl Streep gives a magnificent central performance in much-anticipated biopic of Britain’s first female Prime Minister, who became one of the key political figures of the 20th century. Directed by Phyllida Lloyd (Mamma Mia) and written by Abi Morgan (Brick Lane, Shame) the film also stars Jim Broadbent ((Another Year) as Denis Thatcher, Anthony Head (Merlin) as Geoffrey Howe and Richard E. Grant (Gosford Park) as Michael Heseltine.