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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Hurricane Maria is currently pummelling Puerto Rico with 155mph winds after already leaving at least nine people dead in the Caribbean.
Two men have been seriously injured after reports of a gas explosion on an industrial estate.
The two top figures in the far-right group have been charged over leaflets and videos distributed in May.