Campbell is currently undergoing another medical pitstop while his treatment for Hodgkin's lymphoma continues, before the band commence the UK leg of their latest world tour.

Campbell - who's been receiving pioneering medical attention since last year - says: "I'm back for another dose of the mighty Pembrolizumab. I also did PET and CT scans to determine the efficacy of this treatment, and my ability to continue it into next year. Fingers crossed for a good result!"