Henley Royal Regatta 2017: Day One

PA Spectators gather on the Berkshire side of the River Thames during day one of the Henley Royal Regatta

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Spectators gathered for the five-day rowing spectacular that is the Henley Royal Regatta, on the River Thames

PA Members of the Oxford Brookes University rowing crew bring their boat back into Green's field during day one of the 2016 Henley Royal Regatta

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Crews also readied themselves, with racing starting at 09:00 BST. Oxford Brookes University's rowers carried their boat across the site to take part in the second race

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The Norwich School rowing team were applauded as they made their way out of the boat tent

PA Crew from the University of Bath congratulate each other after winning their race.

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This University of Bath crew won their contest and hugged their opponents afterwards

PA Crew from the Tabor Academy in Massachusetts, USA, adjust their oars outside the boat tent

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The Tabor Academy in Massachusetts, USA, studiously adjusted their oars outside the boat tent

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They are one of many international crews competing

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Competitors warmed up on rowing machines ahead of their races

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Boating blazers are a common sight among the crowds at the event

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Also popular: Moustaches

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The site is a hive of activity, with spectators occasionally having to duck to avoid passing boats

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Numbers are likely to be bigger than ever, with 200,000 people expected

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The regatta was first held in 1839, and apart from two world wars, has been held every year since

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According to the regatta's organisers, the total cost of staging the event is almost £3m each year

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More than 200 races in all will take place at the prestigious event