Black Sabbath are set to reunite for one last album and tour, Ozzy Osbourne has told Metal Hammer.

“The whole Sabbath experience this time around was great,” Osbourne said. “We all made friends, we didn’t f–k around, we all knew that we had a job to do, and we did it. It was a lot of fun. So we’re going to do one more album, and a final tour.

He said the ageing of the band had placed a certain time pressure on making a decision about whether to regroup. “I said, ‘Sharon, I ain’t f—ing 21 anymore. If we’re going to do it, I want to do it before I’m 70. Time isn’t on our side.’ So she made the call and came back and said, ‘Yeah, the record company wants another album.’ I believe Rick Rubin is going to do it with us again.”

No new material has been written yet, but Osbourne said the work would probably begin in 2015. 

"It'll be sooner rather than later," the singer insists. "Obviously a lot of it is coming down to Tony's health, he's obviously got his cancer treatment, but we'll get onto it next year. I don't know if we'll be writing in England or LA, but I'll fly to the f—ing moon for it if I have to!”