In 2005, Thatcher criticised the way the decision to invade Iraq had been made two years previously. Although she still supported the intervention to topple Saddam Hussein, she said that (as a scientist) she would always look for "facts, evidence and proof", before committing the armed forces. She celebrated her 80th birthday on 13 October at the Mandarin Oriental Hotel in Hyde Park, London; guests included the Queen, the Duke of Edinburgh, Princess Alexandra and Tony Blair. Geoffrey Howe, Baron Howe of Aberavon, was also in attendance and said of his former leader: "Her real triumph was to have transformed not just one party but two, so that when Labour did eventually return, the great bulk of Thatcherism was accepted as irreversible."