On June 29, 2011, Prime Minister Stephen Harper unveiled a new personal flag, for use in Canada, for His Royal Highness The Duke of Cambridge. The flag - which is to be flown for the first time throughout the upcoming Tour of Canada by The Duke and Duchess of Cambridge, from June 30th to July 8th - was developed by the Canadian Heraldic Authority, and its creation and design were approved by Her Majesty The Queen and His Royal Highness The Duke of Cambridge.
The new flag is composed of the Royal Arms of Canada with the addition in the centre of the Duke of Cambridge's personal cypher within a wreath of maple leaves and shells - a symbol borrowed from His Royal Highness's personal coat of arms. The coronet of his cypher, above the letter W, indicates that he is the child of the heir apparent of the Sovereign. His Royal Highness's distinctive heraldic mark (the white three-point label with a red shell in the centre) appears at the top.
The new flag is the first to be created for use in Canada since 1962, when it was announced that Her Majesty The Queen had adopted a personal flag for her own use in Canada. When The Queen is in Canada, her flag is flown day and night at any building in which she is in residence. Generally, it is also flown at the saluting base when she conducts troop inspections, and on all vehicles in which she travels.
The Queen approved the creation and design of two personal flags, for use in Canada: one for His Royal Highness The Prince of Wales and the other for his son The Duke of Cambridge.
Her Majesty The Queen has consented to the future creation of such flags for other Members of the Royal Family in connection with Royal Tours of Canada by that Member and based on his / her desire to have a flag issued.