• the collision between aircraft carrier HMAS Melbourne and destroyer HMAS Voyager is the only event in Australian history to be subject to two Royal Commissions?
• John Clarke Hawkshaw was a member of the Royal Commission set up by King Edward VII to decide the British representation at the 1904 St Louis World's Fair?

Facts on topics related to Royal Commission

Parliament of the United Kingdom

• Captain Richard Whitaker Porritt was the first British Member of Parliament to be killed in World War II?
• Derbyshire M.P. George John Venables-Vernon who enthused about Italian literature is the namesake of Vernon County in Australia?
• British architect Rodney Gordon considered running for Parliament, but could not decide which party he wanted to be in?
• British politician David Renton, Baron Renton served for over 60 years in Parliament, representing two parties and then as a life peer, and was the oldest member of the House of Lords when he died?
• Helene Hayman, Baroness Hayman, elected the first Lord Speaker of the House of Lords in 2006, was the first woman to give birth while serving as a British Member of Parliament in the 1970s, and is reported to have been the first woman to breast feed at the Palace of Westminster?
• Lawrence Turner, who presented a Parliamentary petition calling for W. S. Gilbert's copyright on the libretti of Gilbert and Sullivan operas to be extended indefinitely, was the grandson of comic actor George Grossmith who starred in them?
• Robert Crouch led the Parliamentary campaign on the Crichel Down affair involving his constituency, which forced the resignation of Minister of Agriculture, Fisheries and Food Sir Thomas Dugdale?
• approximately 37,500 Local and Personal Acts have been passed by the Parliament of the United Kingdom since 1539?
• former Anglican clergyman and Liberal Party life peer Tim Beaumont was the only Green Party representative in the Parliament of the United Kingdom from 1999 until his death in 2008?
• in 1960, Archbishop Gerald Patrick Aloysius O'Hara became the first papal representative to visit the British Houses of Parliament in four centuries?

New Zealand

• 67 Australian, Canadian, and New Zealand Article XV squadrons were formed during World War II from graduates of the British Commonwealth Air Training Plan?
• nineteenth century New Zealand gum-diggers retrieved 5,000 tons of kauri resin a year for the varnish trade, and that the gum was Auckland's main export?
• Australian cricketer Trevor Chappell was reprimanded by the Prime Ministers of Australia and New Zealand when he rolled an underarm delivery to batsman Brian McKechnie to stop him from lofting the ball for six?
• racecar driver Stan Fox barely survived a crash in the 1995 Indy 500, but later died in a head-on collision on New Zealand's North Island?
• labour law expert Ron McCallum is the first totally blind person to have been appointed to a full professorship at any university in Australia or New Zealand?
• New Zealand cricketer Ted Badcock is the only player to be out first ball in both innings on his Test debut?
• New Zealand MP William Downie Stewart's son, William Downie Stewart, became Mayor of Dunedin—and his daughter Mary served as Lady Mayoress?
• New Zealand Transport Minister Steven Joyce started radio station Energy FM with a group of friends?
• New Zealand Prime Minister John Key was a finalist for the 2009 Cycle Friendly Awards in the 'Cycling Champion of the Year' category?
• New Zealand rugby union footballer Ali Williams did not start playing until he was aged 17, but earned three international caps before he was 22?