Five thousand members of the public took part in the National Lottery Olympic Park Run.
Princess Beatrice officially started the race before taking part in the event herself.
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In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".
Weather conditions remain wet and windy through the weekend.
Mr Banks has given Ukip leader Paul Nuttall an "ultimatum", saying if he is not made chairman he will stop supporting the party.