The doors to Downton Abbey are finally closing. Carnival Films and ITV have announced that there will be no return to the famous home of the Crawley family after the sixth season airs, as they want to end on a high. Downton Abbey has been a huge international success, selling to broadcasters around the world, but its ratings in Britain had started flagging. NBC Universal, which owns the production company behind the show, said in an internal note to staff that the long-running drama was ‘approaching its natural conclusion’. The internal note, seen by the Daily Mail, said: ‘Whilst we...