Harry Judd has returned to Strictly Come Dancing to perform a special underwater waltz for Sport Relief.

The 26-year-old drummer, who beat Jason Donovan and Waterloo Road actress Chelsee Healey in the 2011 final, is seen fitted out in scuba gear whilst submerged in a massive swimming pool alongside dancing partner Aliona Vilani in a picture released earlier today.

The McFly drummer said he was initially bewildered when told of the unusual routine: "When I first heard about Strictly Underwater, I thought, 'How is that going to work?'. I didn't quite understand what they meant and I didn't think it would work – but it does."

Judd first became involved with Sport Relief when McFly released a cover of Queen’s ‘Don’t Stop Me Now’ for the official 2006 single and in the same year also travelled to India to play in several cricket matches for the charity.

The spectacular performance, which sees the pair dancing to Take That’s 'The Flood,' will air on BBC1 on Friday night.