"Quite worrying obviously and a bit nervous about it.”
The competitors were wearing black armbands.
London’s Metropolitan Police had almost doubled the number of officers and sniffer dogs sent out to secure the event, saying this was to reassure the public and not in response to a specific threat.
In the Skies above the British capital, a police presence also looked on.
Along the entire 26 mile route from leafy Greenwich to the Tower of London, Big Ben and Buckingham Palace, litter bins had been removed as part of the enhanced security.
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