MARK CHAPMAN has stepped down from BBC 5 Live radio duties in solidarity with Gary Lineker. The radio and Match of the Day 2 host, 49, was due to be on air this afternoon to help cover the Saturday football schedule for 5 Live Sport. 5 Mark Chapman will not appear on BBC 5 Live this afternoon Credit: PA 5 Colin Murray won't be hosting Fighting Talk Credit: Getty However, SunSport can reveal he will not be taking to the mic and the entire programme is at risk of being pulled - plunging the BBC into further turmoil. At 12pm,...