Complex sentence: Campbell was featured on the Sky Sports series "Where are They Now?" in 2008, when he was the co-owner of a security company "T1 Protection", specialising in supplying bodyguards to celebrities and other wealthy customers whilst traveling abroad.
Split into simpler sentences: Campbell was featured on the Sky Sports series "Where are They Now?" in 2008. He is now the co-owner of a security company, named "T1 Protection", specialising in supplying bodyguards to celebrities and other wealthy customers whilst they are traveling abroad.