The collection included “love triangle” letters from former husbands George Harrison and Eric Clapton
The fashion model was married to both musicians at various points, and is cited as the influence for songs including 'Something' and 'Layla'
The four biopics will intersect to "tell the story of the greatest band in history"
"I said, ‘Look, I'll show you a few tricks, how to encourage the songs’"
"It’s a good opportunity for everyone"
It comes after someone suggested he form a band with Sean Lennon and Dhani Harrison
"Paul and I would not have done that"
The band's final song was released earlier this month
It has also hit milestones including fastest-selling single of the year and most-streamed Beatles track in one week
The filmmaker worked with the band on ‘Now And Then’ and the ‘Get Back’ docu-series