CHRIS EVANS, a disc-jock who liked Virgin Radio so much that he bought it for himself [with a little help from venture capitalists Apax Partners] should consider protecting his investment - by firing Chris Evans! The latest RJAR figures show that his daily breakfast show has shed listeners at the rate 336,000 over the last quarter. The station’s overall audience also declined by 331,000 during the period to 3.9 million. In best Canute-style, Virgin Radio’s chief executive John Pearson said: ‘We are obviously disappointed, but after having three fantastic results in a row we can’t grumble too much. We will have to live with it ... we have had schedule changes and are looking forward to better figures.’