British parliamentary approval for the invasion of Iraq
British parliamentary approval for the invasion of Iraq was given by the elected members of the House of Commons to Tony Blair's government on the eve of the 2003 invasion of Iraq, in a series of two votes, on 18 March 2003. == Constitutional background == There is no constitutional requirement for the Crown to seek any explicit form of parliamentary approval before committing British forces to military action.
Source: Wikipedia — British parliamentary approval for the invasion of Iraq (CC BY-SA 4.0)