The main building was refurbished, and an extension built to the rear. The radio stations BBC Radio 3, BBC Radio 4, BBC Radio 4 Extra and the BBC World Service transferred to refurbished studios within the building. The extension links the old building with the John Peel Wing, and includes a new combined newsroom for BBC News, with studios for the BBC News channel, BBC World News and other news programming. The move of news operations from BBC Television Centre was completed in March 2013.