Former Conservative prime minister Sir John Major has strongly criticised Boris Johnson and his government for the handling of the Downing Street party scandal. <br /> <br />Speaking at the Institute of Government, he said: "Brazen excuses were dreamed up. Day after day the public was asked to believe the unbelievable. Ministers were sent out to defend the indefensible - making themselves look gullible or foolish." <br /> Report by Guzzardib. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn