But the outside with Mrs Thatcher is easier to read than the inside. Streeps rummaging around the psyche will reveal a woman who was never knowingly in two minds about anything (with the possible exception of the Exchange Rate Mechanism). Sylvia Sims, who played her three times, recalls meeting Mrs T at a dinner where red wine was spilled. I remember catching her eye and giving her a grin. It was like watching through glass. You got nothing at all.