Demos recorded by Amy Winehouse for her planned third album were destroyed after her death, her former label boss has revealed.

David Joseph, ­chairman and CEO of Universal Music UK, said he made a “moral” decision not to release any of the demos after her death. Speaking to Billboard in an interview about Asif Kapadia’s forthcoming documentary Amy, on which Joseph served as an executive producer, the label boss said: “Taking a stem or a vocal is not ­something that would ever happen on my watch. It now can’t happen on anyone else’s.”

Winehouse’s regular producer Salaam Remi said the singer had finished writing her follow-up to Back To Black just a few weeks before he death in July 2011. “As far as I could see, we had 14 songs. Whatever needed to happen, it was right there,” he told Billboard.

An outtakes collection, Lioness, was released at the end of 2011 and will likely remain Winehouse’s final release. Read the rest of the feature for more insight on the film from Mark Ronson, Sam Smith, director Asif Kapadia, producer James Gay-Rees and others. Winehouse’s family have criticised the film as misleading, saying it contains some “basic untruths”.

Watch a clip from Amy ahead of its arrival in cinemas on July 3.