The Foreign Office mounted a fightback yesterday against allegations that Jack Straw and Colin Powell had expressed serious doubts about whether Baghdad possessed weapons of mass destruction before the start of the Iraq war. As Tony Blair faced allegations from a former Cabinet colleague that he had "duped" the British people over Saddam Hussein's weapons capabilities, the Foreign Office issued a detailed rebuttal of allegations, made in the Guardian newspaper, that were seized on by news media around the world. The paper said Mr Straw, the Foreign Secretary, and Mr Powell, his United States counterpart, had privately expressed serious doubts...