Set for auction is Paul McCartney's 1991 demo for "Angle In Disguise" -- a song Ringo Starr recorded, but ultimately shelved. The tune was the written for Ringo's comeback album -- 1992's Time Takes Time collection -- the album which marked Ringo's first set since getting sober in 1988.

Redsector.com reported the he cassette features "two versions of the track -- a rough demo with Sir Paul on vocals and a fuller 'mixed' version with musicians and backing vocals and Sir Ringo singing." British DJ Tony Prince is selling the cassette after McCartney enlisted him in finding a suitable artist to cover the songs after Ringo bumped it from the album.

According to the report, the tape, with other memorabilia, will go under the hammer on May 19th at Omega Auctions' online sale with 25 percent of proceeds donated to the NHS Charities Together Covid-19 Urgent Appeal. The tape is expected to sell for around $25,000.

Auctioneer Paul Fairweather said: "It's fantastic to be able to bring to the market a previously unheard and unreleased track. We think the track certainly had enough about it to be included in the album and I am sure if Paul was to release this himself it would certainly prove a hit with fans."

Paul McCartney was asked about why he leaves so much material on the cutting room floor: "Probably the reason it's unreleased is that it's not that good, y'know? We have little bits and pieces, which I might release one of these days, but generally, if it's not released, it's 'cause I don't think it's good enough."

Ringo explained to us that although he and McCartney remain extremely close, these days, their musical team-ups are far more casual than fans -- or concert promoters -- would like them to be: "Well, there won't be any half-reunion (of the Beatles). I mean, in 2010 he surprised me -- I was playing Radio City Music Hall and he get got up and he played 'Birthday,' which I played with him, because I wanted the opportunity to play with him again. We do hang out a bit, y'know, what I mean, but we're not in each other's pockets. And if the opportunity's real, we play together -- I've played on a couple of his records, he's played on mine. But, no, we never sit there saying, 'Oh, yeah, we'll put it together and I'll do 'Yesterday' (laughs)."

AUDIO: RINGO STARR ON THE BEATLES BEING BUSY
AUDIO: PAUL MCCARTNEY ON UNRELEASED SOLO MATERIAL