Dodger blinks and: "Blimey, that's one to be asked out of nowhere," he says with a laugh in his tone. "Don't know if I know any 'bout the waves, not proper, but I've got some up in the old head."

He thinks and, carefully, haltingly, recalls an old drinking song he had heard back when he was a child. His voice is a bit rusty - it's been a while - but the more he goes, the more he remembers.