"He really wanted to do it and he was determined to do it," the group's guitarist said following Osbourne's death

"I didn’t realize then that I would never see Ozzy again after that night," Butler writes of the July 5 "Back to the Beginning" show in England.

Sykes appeared on Thin Lizzy's harder-edged 1983 album Thunder and Lightning, the group's Top 5 U.K. hit studio finale with the late frontman Phil Lynott. Sykes then joined Whitesnake for a two-album mid-'80s stint that began with the reworked 1984 edition of Slide It In.