Princes William and Harry have given their "final word" on their mother in a new documentary, according to director Henry Singer.

Princess Diana

Princess Diana

The filmmaker, who previously made the acclaimed Twin Towers documentary 'The Falling Man', has helmed 'Diana, 7 Days' for the BBC and has given Brits an insight into what the Princes discussed during their interviews for the programme.

He shared: "They talk about coming down to London, what it was like to go outside, and how people were so anxious to see them, and how people were crying, and yet they didn't cry."

Prince Harry, who was 12 at the time of his mother's death, discusses trying to keep his emotions in check while he was surrounded by large crowds of people.

Prince William, meanwhile, speaks of how he viewed the procession behind Diana's coffin through the "safety blanket" of his bowed head.

Speaking to the Radio Times, Singer explained: "My film may not have the headlines that other films have had, but I would like to think I will do something that lasts the test of time, and that, for me, is much more important than breaking news."

The director said, too, that the documentary might serve to draw a line under the issue for the Princes.

Singer said: "I think the Princes hope they have answered these questions once and for all, and they don't need to be asked them anymore, and that people can refer back to this film and our words within it if they have questions.

"That this is their first, and final word on it."