Diamond Jubilee of Elizabeth II II and her husband the Duke of Edinburgh, toured only the United Kingdom. Other parts of the Commonwealth were toured by her children and grandchildren as her representatives. At the 2011 Commonwealth Heads of Government Meeting in Perth, Australia, British Prime Minister David Cameron announced the creation of the Queen Elizabeth Diamond Jubilee Trust, which was officially launched in the UK on 6 February 2012. Chaired by former British prime minister Sir John Major, the trust was intended to support charitable organisations and projects across the Commonwealth of Nations, focusing on areas such as cures for diseases and the promotion
Prime Minister of Australia becomes acting Prime Minister in those circumstances. Three Prime Ministers have died in office – Joseph Lyons (1939), John Curtin (1945) and Harold Holt (1967). In each of these cases, the Deputy Prime Minister (an unofficial office at the time) became an interim Prime Minister, pending an election of a new leader of the government party. In none of these cases was the interim Prime Minister successful at the subsequent election. As of , there are seven living former Australian Prime Ministers. The greatest number of living former Prime Ministers at any one time was eight. This has occurred twice: