The BBC on Saturday is dealing with a deepening row as it emerged that it decided not to broadcast an episode narrated by world-famous conservationist Sir David Attenborough for a new wildlife series over fears of a right-wing backlash, amid an ongoing controversy over affecting its sports programming involving football legend Gary Lineker. Several of the broadcaster's regular sports presenters have stepped back in solidarity with former England captain and TV pundit Lineker after he was suspended over a controversial tweet related to the government’s migration policy.