Disney relaxed rules to accommodate the Beatles’ “Scouse swearing” in a new documentary, its director has revealed.

Peter Jackson directed The Beatles: Get Back, which explores the creation of the band’s 1970 album Let it Be and makes use of homemade footage taken during recording sessions.

The director said he persuaded Disney to relax its rules on bad language to accommodate more foul-mouthed footage from the Liverpool-born Beatles.

Jackson, best known for his work on the Lord of the Rings trilogy, told the Radio Times: “We’ve had to have a discussion with Disney about the swearing. The Beatles are Scouse boys and they freely swear, but not in an aggressive or sexual way. We got Disney to agree to have swearing, which I think is the first time for a Disney channel.

“That makes them feel modern, too. Obviously people did swear in the 60s, but not when they were being filmed.”

The director has gone through 57 hours of footage, recorded in January 1969, showing John Lennon, Sir Paul McCartney, George Harrison and Ringo Starr making the album that would become their final release as a group.