For more 'mobot' videos, click here
Stars are 'doing the mobot' to raise money for Mo Farah's charity.
Learn the moves and make your own mobot video to be in with a chance of appearing in the official video here
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Live updates from our team of producer and reporters via the ITV London Facebook page.
Mayor Sadiq Khan urged Londoners to join him at 6pm in Trafalgar Square.
Pictures of today's events unfolding following a major security incident at the Houses of Parliament.