Olympic silver medallist Michael Jamieson was also at the British Swimming Heroes event at the Gurnell leisure centre in Ealing.
He told Emma Walden that it was an exciting time to be involved in the sport.
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Sir Bernard Hogan-Howe's decision to retire comes after growing speculation about his future and his relationship with mayor Sadiq Khan.
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The curtain will come down on the show for the final time at the Piccadilly Theatre in March next year, before embarking on a UK tour.