Buckingham Palace said that the Queen was not in the building when the man tried to get in, but would make no further comment.
More top news
An Irish man has become an unwitting internet star after his Facebook profile picture was photoshopped dozens of times.
Stranded refugees and migrants clashed with police after young Moroccan man accidentally electrocuted himself
The flame-haired royal is an accomplished polo player but that didn't stop him taking a tumble not once, but twice, during the game.