The Queen and The Duke of Edinburgh attend the Commonwealth Day Observance at Westminster Abbey, London SW1; and attend a reception at Marlborough House, London SW1, to mark Commonwealth Day and to celebrate the 50th anniversary of the modern Commonwealth. The Prince of Wales pays official visits to Argentina, Uruguay and the Falkland Islands. The Duke of York attends a dinner to mark the opening of the Nato Conference at the Royal United Services Institute, London SW1. The Princess Royal visits Japan, Philippines and New Zealand.
Changing of the Guard
The Household Cavalry Mounted Regiment mounts the Queen's Life Guard at Horse Guards, 11am; 1st Battalion Coldstream Guards mounts the Queen's Guard, at Buckingham Palace, 11.30am, band provided by the Coldstream Guards.