The Chilcot Iraq inquiry has released details of the legal advice given to Tony Blair, from the then Attorney General Lord Goldsmith, prior to the invasion of Iraq.
In the released correspondence (dated February 12 2003), Lord Goldsmith told Blair that should military action be taken without further approval by the UN Security Council, he expected "the government to be accused of acting unlawfully".
In a letter to Blair on 30 January, 2003, Lord Goldsmith said he "remained of the view that the correct legal interpretation of resolution 1441 is that it does not authorise the use of military force without a further determination by the Security Council".
However, following Blair's meeting with Bush in 2003 (when Blair promised Bush that Britain would go to war) Goldsmith changed his view. The BBC quotes him as saying he was "prepared to accept that a reasonable case" could be made that military action was authorised by existing resolutions, including resolution 1441.