In letters patent gazetted on 11 December 1917 the King restricted the style of "Royal Highness" and the titular dignity of "Prince (or Princess) of Great Britain and Ireland" to the children of the Sovereign, the children of the sons of the Sovereign and the eldest living son of the eldest living son of a Prince of Wales. The letters patent also stated that "the titles of Royal Highness, Highness or Serene Highness, and the titular dignity of Prince and Princess shall cease except those titles already granted and remaining unrevoked". George's relatives who fought on the German side, such as Ernest Augustus, Crown Prince of Hanover, and Charles Edward, Duke of Saxe-Coburg and Gotha, had their British peerages suspended by a 1919 Order in Council under the provisions of the Titles Deprivation Act 1917. Under pressure from his mother, Queen Alexandra, the King also removed the Garter flags of his German relations from St George's Chapel, Windsor Castle.