Keenan last worked with COC in 2010. He never officially left the band, although the current lineup of Reed Mullin, Woody Weatherman and Mike Dean released their IX, their second album without him, in June.

Speaking ahead of Down's headline appearance at Bloodstock last night, Keenan told TeamRock: "The old COC thing's been coming up a lot. We're talking to Reed and Woody about getting that going.

"That's going to take a lot of attention. We're talking about just going to Europe and playing shows as the Deliverance four-piece, and starting from there to get it back together."