When guitarist Damon Johnson was recruited from Alice Cooper's band to play in Thin Lizzy in 2011, he had no idea that he was also joining another band.

"The initial discussions were just about filling that soon-to-be-vacant guitar spot," Johnson said in a phone interview this week. "And that was enough for me, as a student of Thin Lizzy's music - not just the guitar players, but Phil [Lynott]'s songwriting.

"So it was extra exciting for me, literally the second or third day that I was there, [that] there was a discussion about wanting to write and record new material for a Thin Lizzy album."