A man shouting and holding knives has been tasered by police outside Buckingham Palace.
The drama unfolded as hundreds of tourists and Londoners gathered to watch the changing of the guard.
A warning - Nick Thatcher's report contains footage that some viewers may find upsetting.
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Westminster Council also found evidence of rats and contamination of food which risked making customers ill.
The biggest drop in popularity was swimming where almost 250,000 fewer people are taking part in the sport.
The plaster dinosaur skeleton is not considered relevant enough to what is happening to the natural world today.