Boris Johnson whilst promoting her new book on The One Show.The actress offered some friendly fashion advice to the Conservative Party leader on the BBC show.Speaking with hosts Ronan Keating and Sam Quek, Joan was full of stories about celebrities she had met over the years.The hosts quizzed Joan asking if she had any friendly fashion advice for our current politicians.Sam said to Joan: "How about Boris, Boris Johnson?"Any advice for him?"Joan responded: "Yes, I would say go and get your suits tailored better."The iconic actress then went on to reveal that she was co-workers with the prime minister at one point when she worked with The Spectator.She said: "But he used to be my boss."I write about that in the diaries, that he was my boss,.