Career: He got his big break when he was signed up to co-host Radio 1's Session programme alongside Donna Legge in 1999. His witty one-liners and laidback presenting style proved popular, and the pair often deputised for the likes of John Peel, Steve Lamacq and Mary Anne Hobbs. In 2002, Colin was headhunted to front Channel 4's ill-fated breakfast show RI:SE but left to front the channel's late-night music shows. In late 2003, he was reunited with RI:SE co-host Edith Bowman for The Colin and Edith Show, which pulled in more than five million listeners before the pair went their seperate ways in 2006. Since then, he has presented Five's American football show, NFL Live, and the channel's European Poker Tour Series. He currently presents the channel's coverage of the UEFA Cup and hosts the topical sports-based news show Fighting Talk on BBC Radio Five Live. However, he hasn't forgotten his roots and also presents a late-night weekend show on Radio Ulster.

Career: Riley's big break came in 2008 when she was chosen from more than 1,000 applicants to replace Carol Vorderman on Countdown. She presented her first show alongside Jeff Stelling in January 2009, and reached her 1,000th episode in June 2013. Away from the numbers and letters on Countdown, she began co-hosting The Gadget Show alongside Jason Bradbury in June 2013. She was a contestant on Strictly Come Dancing in 2013 and was the fifth celebrity to be eliminated.

Career: Jackson picked up silver medals at the 1986 Commonwealth Games and the 1988 Olympics in Seoul. He set a world record for the 110m hurdles in August 1993, winning his first World Championships gold medal. The record stood for 13 years. Between August 1993 and February 1995, he won 44 consecutive races. During a distinguished sporting career, he won two World Championships, a World Indoor Championship, four European Championships, three European Indoor Championships, and two Commonwealth Games. After retiring in 2003, Jackson became a coach in athletics and other sports, and enjoys a media career with the BBC. In 2005, he lost out to Darren Gough in the final of Strictly Come Dancing.