Bigelow's war film is nominated for a host of trophies at next month's (Mar10) Oscars, and after winning a string of awards at several recent ceremonies, she picked up another honour from the British capital's critics.
Gritty U.K. movie Fish Tank was also a big winner on the night - the film picked up four of the event's major prizes, including Best British Director for Andrea Arnold, The Attenborough Award for British Film Of The Year, Best Supporting Actor for Michael Fassbender and Young British Performer Of The Year for newcomer Katie Jarvis.
A Prophet was named the Film of the Year.
Oscar-nominated Brit Carey Mulligan was named Best British Actress for An Education, while fellow Academy Award hopeful Colin Firth took home Best British Actor for A Single Man.
In the international acting categories, Mo’Nique was voted Best Actress for Precious, while Christoph Waltz was the Best Actor winner for Inglourious Basterds. Speaking at the ceremony, Waltz told WENN, "London critics giving me this? It's not too late, thank you."
Anne-Marie Duff won the Best Supporting Actress honour for her role as John Lennon's mother in Nowhere Boy.
David Bowie's son Duncan Jones was presented with the Breakthrough British Filmmaker honour for his directorial debut Moon.
Meanwhile, Quentin Tarantino received a special prize for filmmaking, winning the Dilys Powell Award For Excellence In Cinema.
Tarantino was shocked to be handed the prize, because he feels too young to receive such a title when he is only half way through his career.
Speaking at the event, he tells WENN, "I was reading the pack for the ceremony and it (showed previous Dilys Powell winners) John Mills and Richard Harris and I was like, 'F**k me, I am way too young to get this award'. I actually really like that. I actually like the idea of giving this award to somebody in the middle of their career... It's pretty gratifying. It's just wonderful to get an award and an honour in your name."