Dominic, 44, said it was the only music that Harry, 29, would listen to on their recent Walking With The Wounded expedition to the South Pole.

He said: “Harry has a terrible selection on his iPod. It is the sort of thing soldiers listen to. Hardcore thrash metal.”

But Dominic, star of The Wire, said the Prince, who has flown Apache helicopters in Afghanistan, showed real talent when it came to keeping morale high with a string of “dirty jokes”.

He said: “Harry told eye-wateringly rude jokes, which for a non-soldier like me was quite shocking.”

Dominic was a celebrity patron of Team Commonwealth with the Prince, one of three teams battling to the South Pole to raise cash for the charity Walking With The Wounded.