Hundreds of fundraisers ran up the 1,037 steps inside one of London's most iconic buildings for charity.
More than 250 people raced up 38 floors inside 30 St Mary Axe, known as the Gherkin, to raise money for the NSPCC.
London's Gay Men's Chorus serenaded participants as they climbed the 180m (591ft) building in groups on Sunday.
At the top runners were handed a medal and a celebratory drink and given the opportunity to enjoy panoramic views of London while they caught their breath.
World swimming champion Keri-Anne Payne also took part in the challenge. The event organisers were hoping to raise £125,000 for the NSPCC's Child's Voice Appeal.
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