In relations with the United Kingdom and the Commonwealth, Gillard represented Australia at the Wedding of Prince William and Catherine Middleton in London in April 2011 and hosted the Commonwealth Heads of Government Meeting (CHOGM) in Perth in October of that year. The Perth CHOGM saw the historic announcement, by Gillard and British Prime Minister David Cameron, of changes to the succession laws regarding to thrones of the Commonwealth realms, overturning rules privileging male over female heirs to the line of succession and removing a ban on Roman Catholic consorts. At the CHOGM, Gillard also hosted Queen Elizabeth II, Queen of Australia in what was almost certainly the monarch's final tour Down Under, due to her advanced age.