Beatles fanatics will no doubt be aware of 'Unforgettable', the experimental album that Paul McCartney made for his bandmates in 1965.

Only three other copies of the album were pressed - one for John Lennon, George Harrison and Ringo Starr - and although it has been available on bootleg and in various nooks and crannies of the internet over the years, someone has now uploaded it to YouTube for easier listening.

McCartney has described the recording as 'more like a radio show' than an album per se, but whatever's left of the recording is a 'compilation of odd things' - snippets of interviews, other songs, experimental recordings - as a present for Fab Four.

As he said himself in the book 'The Unreleased Beatles: Music And Film': "I had two Brenell tape recorders set up at home, on which I made experimental recordings and tape loops, like the ones in ‘Tomorrow Never Knows.’ And once I put together something crazy, something left field, just for the other Beatles, a fun thing which they could play late in the evening. It was just something for the mates, basically.

It was called Unforgettable and it started with Nat ‘King’ Cole singing ‘Unforgettable,’ then I came in over the top as the announcer, ‘Yes, unforgettable, that’s what you are! And today in Unforgettable…’ It was like a magazine program: Full of weird interviews, experimental music, tape loops, some tracks I knew the others hadn’t heard. It was just a compilation of odd things. I took the tape to Dick James’ studio and they cut me three acetate discs. Unfortunately, the quality of these discs was such that they wore out as you played them for a couple of weeks, but then they must have worn out. There’s probably a tape somewhere, though.”

Hear it below: 

H/T: Uproxx