Henley Royal Regatta 2017: Day OnePASpectators gathered for the five-day rowing spectacular that is the Henley Royal Regatta, on the River ThamesPACrews 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 racePAThe Norwich School rowing team were applauded as they made their way out of the boat tentPAThis University of Bath crew won their contest and hugged their opponents afterwardsPAThe Tabor Academy in Massachusetts, USA, studiously adjusted their oars outside the boat tentGetty ImagesThey are one of many international crews competingGetty ImagesCompetitors warmed up on rowing machines ahead of their racesGetty ImagesBoating blazers are a common sight among the crowds at the eventGetty ImagesAlso popular: MoustachesGetty ImagesThe site is a hive of activity, with spectators occasionally having to duck to avoid passing boatsGetty ImagesNumbers are likely to be bigger than ever, with 200,000 people expectedGetty ImagesThe regatta was first held in 1839, and apart from two world wars, has been held every year sinceGetty ImagesAccording to the regatta's organisers, the total cost of staging the event is almost £3m each yearGetty ImagesMore than 200 races in all will take place at the prestigious event