Joe Calzaghe and Phil Taylor, Phil Vickery and Ravi Bopara, Sir Geoff Hurst and Sarah Storey, and Sophie Hosking and Helen Glover.

Featuring Jodie Prenger and Gary Wilmot, Kerry Ellis and Tim Rice, Paul Nicholas and Ben Foster, and Danielle Hope and Richard Blackwood.

Vicki Michelle and Ian Lavender, Simon Day and Arabella Weir, Meera Syal and Phil Cornwell, and Ewen MacIntosh and Simon Greenall.

Rachel De Thame and Diarmuid Gavin, Jilly Goolden and Olly Smith, Simon Rimmer and Kim Woodburn, and Lee Stafford and Tommy Walsh.

Featuring Britain's tallest man and woman Neil Fingleton and Jessica Pardoe, 400m hurdles British record holder Sally Gunnell and 100m British record holder Linford Christie, Kellie Bright and Tim Bentinck from The Archers, the world's longest-running soap opera, and Andy Akinwolere and Janet Ellis, former presenters of Blue Peter, the world's longest-running children's television programme.

Ali Campbell and Mike Rutherford, Keren Woodward and Sara Dallin, Ritchie Neville and Scott Robinson, and Sandie Shaw and Sheila Ferguson.

Jennie McAlpine and Justin Moorhouse, Kate Robbins and Alistair McGowan, Katy Hill and Trey Farley, and Mark Little and Ted Robbins.

A special celebrity EastEnders edition featuring Nitin Ganatra and Rita Simons, Peter Dean and Todd Carty, Shaun Williamson and Lucy Speed, and Shona McGarty and Tony Discipline.

Contestants include Graeme Garden, Dan Snow, Susie Dent, Robert Peston and Germaine Greer.