British filmmaker of Indian origin Asif Kapadia won the Best Documentary honour for "Amy", which narrates the life of late singer Amy Winehouse. He thanked the crew for trusting him and his work.
"Thank you to all of the crew and all of our contributors who trusted in us 'Amy' #EEBAFTAs @AmyFilmUK @AmyTheMovie," Kapadia tweeted after winning the honour.
At the awards ceremony, which was held at the Royal Opera House here, Kapadia said: "In the end it was all about Amy.
"We really fell in love with her when making the film. And our aim and mission was really to try and tell the truth about her. To show the world what an amazing person she was, how intelligent, how witty, how beautiful she was, before it all kind of got out of control and went a bit crazy."
The documentary uses archive footage to tell the story of the "Back to Black" singer's life and premature death. She died at the age of 27.
The film was nominated along with "Cartel Land", "He Named Me Malala", "Listen to me Marlon", and "Sherpa" to win the prize.