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: After hospital radio, Culshaw served his media apprenticeship as a DJ at several commercial stations, but rose to fame in January 1998 during his time at Capital Radio when his phone call got put through to then-prime minister Tony Blair while impersonating Tory leader of the time William Hague. The two had a lengthy conversation before the penny dropped. Between 2001 and 2002 he had a programme on ITV called Alter Ego where he interviewed male celebrities in their own style of speaking. On ITV he also appeared on 2DTV, then The Impressionable Jon Culshaw, before finding his real niche with the BBC series Dead Ringers. He took part in Celebrity Fame Academy in 2005, where he met Debra Stephenson, with whom he starred in The Impressions Show.