Producer James Gay-Rees, who recently picked up an Oscar for Asif Kapadia-directed Amy, has spoken about his upcoming documentary on iconic band Oasis.

“[Liam and Noel Gallagher are] brilliant to work with, both completely insane and hysterically funny,” said Gay-Rees, speaking today at the BASE [formerly BVA] Insight Forum in London.

“It’s a really interesting anatomy of how two complete chancers - in their own words - became the biggest band in the world from a standing start in just two years, despite themselves.”

The producer revealed that brothers Noel and Liam Gallagher - whom he admitted “can’t be in the same room as each other” - approached him and Asif Kapadia (who is exec producing) with the idea for the film, which Mat Whitecross (The Road To Guantanamo) will direct.

“Noel got in touch. He asked: ‘Where have all the rock and roll heroes gone? Where’s all the mystique?’” recalled the producer, explaining that the team behind the film want it to be a “call to arms” for the music industry.

“Oasis spoke for a generation, for a moment in time. Where’s the next band with real balls going to come from?” he asked.