A man was tasered by police today after holding a knife to his throat outside Buckingham Palace.
The dramatic incident saw the man brandish two knives in front of hundreds of terrified tourists watching the popular Changing of the Guard event at 11.50am outside the palace in central London.
The scene was cordoned off 30 yards from the palace gates and an ambulance was nearby. Two knives with six-inch blades and a pair of Nike high top trainers lay inside the cordoned-off area.