Headbanging at sea on a heavy metal cruise – ‘As I began photographing, I realised I had white corpse paint all over my cameras’

Ozzy Osbourne’s voice bellowed over the sound system of Independence of the Seas as I pressed my fork into a stack of all-you-can-eat pancakes. I sat hypnotised by calming ocean waves, while Tony Iommi’s guitar riffs on the Black Sabbath album Sabotage provided a head-banging soundtrack to breakfast..