According to BBC, a cache of unreleased Thin Lizzy material has been released to Universal Music for release as a Thin Lizzy box set due out later this year. The box set will containing up to 700 songs, spanning the decade from 1971-1981, when the band was with Decca Records.

Before his untimely demise in January 1986, frontman Phil Lynott reportedly gave an unidentified caretaker 150 tapes of unreleased material. This is the second box set to be released featuring archived work of the band, referring to last years Live at the BBC release.

“There are out-takes, unheard versions of Thin Lizzy hits and, most exciting of all, material which was recorded but never released at the time,” Steve Hammonds, project manager behind the new Thin Lizzy box set, told the Irish Independent.

Thin Lizzy members Scott Gorham and Brian Downey are involved in the project, according to Hammonds, and will have “final say” in which songs get released.

As for the unidentified caretaker, Hammonds tells the Irish Independent that “Phil Lynott passed the material on to a third party for safekeeping. They held on to it for decades because they were waiting for the right people to come along.”

“They really didn’t trust anyone enough to release it properly,” Hammonds added. “The catalyst was a boxed set of Thin Lizzy BBC sessions we issued earlier this year, which made them believe we were the right people. No money has changed hands, this person is a Thin Lizzy fan.”