Royal Family Attend The Reopening of The Royal Opera House, Covent Garden -- Left to right - Princess Elizabeth; Princess Margaret; H.M. the Queen; H.M. the King; and Queen Mary in the Royal box at the Royal Opera House, Covent Garden, London, during the opening performance of the season.A brilliant audience greeted the reopening of the Royal Opera House, Covent Garden, when the Sadler's Wells ballet company performed the Tchaikovsky ballet," The sleeping Beauty". Their Majesties the King and Queen, were present, accompanied by Queen Mary, Princess Elizabeth and Princess Margaret. The audience also include the Prime Minister and Mrs. Attlee, as well as many Cabinet Ministers and foreign diplomats. The building itself escaped damage during the war, and was easily restored to its traditional splendour. February 20, 1946.