Prince Edward, Chairman, Duke of Edinburgh's Award Pegasus Project, attends the Travel Industry Globe Awards at the Grosvenor House Hotel, London W1. Princess Alexandra visits the National Clinical PET Centre of Guy's and St Thomas's Hospitals at St Thomas's Hospital, London SE1.
Changing of the Guard
The Household Cavalry Mounted Regiment mounts the Queen's Life Guard at Horse Guards, 11am.
The Precincts at Windsor Castle open between 10am and 4pm, and the State Apartments between 10.30am and 3pm.