Motörhead guitarist Phil Campbell is at work on his debut full-length solo album. Guests announced so far include Judas Priest frontman Rob Halford and Ugly Kid Joe vocalist Whitfield Crane.

The first guest appearance on Phil's solo album happened yesterday (February 7th) with Chris Fehn of Slipknot coming to the studio to record some drums, followed by a late night jam session. Fehn posted the following via Instagram: