Mr Prebble was asked to consider whether the BBC was fulfilling its obligation to provide “breadth and diversity of opinion” and being impartial on immigration, the EU and religion. He found that it was too reliant on the views of politicians, who tended to steer clear of “taboo” subjects, such as immigration, and warned that “even today the debate on the BBC may not reflect the public mood”. He said coverage was at risk of becoming “homogeneous” because too many journalists were based at the new Broadcasting House in London.