When people call our unwritten constitution a "gentleman's agreement", they reveal more than they intend. It allows the unelected gentlemen who advise the prime minister to act without reference to the proles. Britain went to war in Iraq because the public and parliament were not allowed to know when the decision was made, what the intelligence reports really said, and what the attorney-general wrote about the legality of an invasion. Had the truth not been suppressed, our armed forces could never have attacked Iraq.