 She was terribly good at it. She always did her homework, so she knew what answers she was going to give. But she was also, she had a very quick sense of humour, and that stood her, I think, in very good stead. She could be quite frightening, actually, but she could be utterly charming. And once a black cab driver, one of the famous London black cabs, picked me up outside Downing Street, and he turned around and said, Oh, hello, Karen. He said, I picked someone up the other day, been in to see your mum, the Prime Minister he had. Hmm?