After the Trooping the Colour the King's Troop Royal Horse Artillery fired a 41-gun salute in Green Park to mark the Queen's official birthday.
The royals then gathered on the balcony at Buckingham Palace to watch the traditional RAF flypast.
Thousands of spectators crowded around the front of the palace and on The Mall, many cheering as a succession of planes roared overhead.
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Thickening cloud and rain moving in across Ireland and the southwest overnight