An unheard track by Sir Paul McCartney and Sir Ringo Starr recorded after the Beatles split is heading for auction.

Angel In Disguise could be the only song co-written exclusively by the band’s former bassist and drummer, according to auctioneers.

The ex-Beatles recorded the demo for Sir Ringo’s 1992 solo album Time Takes Time but it did not make the cut.

The demo tape going under the hammer (Omega Auctions/PA)

Former Radio Luxembourg DJ Tony Prince is selling the cassette, which is expected to fetch up to £20,000.

He was asked to find artists to record alternative versions of Angel In Disguise in the 1990s, after Sir Ringo rejected the track.

The song has never been heard publicly.

Auctioneer Paul Fairweather said: “It’s fantastic to be able to bring to the market a previously unheard and unreleased track…

The music for Angel In Disguise (Omega Auctions/PA)

“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.”

The cassette contains 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.

Another Sir Ringo demo, Everyone Wins, which was also shelved but later released on a compilation recording, is also included on the tape.

The tape, with other memorabilia, will go under the hammer at Omega Auctions’ online sale on May 19, with 25% of proceeds donated to the NHS Charities Together Covid-19 Urgent Appeal.