This is the moment a Royal Navy sailor collapsed on Whitehall during a rehearsal for the coronation.<br /><br />The woman had to be helped from the ground after struggling during training in central London in the early hours of Wednesday (3/5).<br /><br />Footage shot at around 2:15am shows concerned colleagues rushing to her aid before she is escorted from the area.<br /><br />The onlooker who shot the footage, who asked to remain anonymous, said: "I felt really privileged to see [the practice].<br /><br />"I just wanted to show people how hard they are working - it shows how committed they are.<br /><br />"It was wonderful to watch them practicing and it felt very special to be seeing it before anyone else.<br /><br />"I was just panning across when I noticed her fall down. I hope she's okay - I felt awful for her."<br /><br />A stretcher was bought for the sailor but she stood up again and didn't need it, video shows.<br /><br />"Someone very important looking came over to help her," the eyewitness added. "They were all very professional."<br /><br />A Royal Navy spokesperson said: "We are very proud of our personnel who are working incredibly hard at this time.<br /><br />"Their training has been scheduled to condition personnel in a measured way for the rigours of long periods of standing and marching.<br /><br />"This is an intense period for them, and significant periods of rest have been scheduled before and after major periods of activity."<br /><br />It's understood the woman - whose identity has been obscured - fully recovered and continued to train.<br /><br />King Charles III's coronation takes place in London this Saturday (6/5).<br /><br />More than 6,000 members of Britain's armed forces will take part - the largest military ceremonial operation for 70 years.