Glazers hit back at Red Knights

City figures supporting the Red Knights who are preparing a bid for Manchester United are discovering that it may not be a free ride.   The Glazer family are considering ending their relationship with Goldman Sachs.   The company's chief economist, Jim O'Neill (who is said to have invented the term 'Bric economics'), is a key member of the Red Knights group.   The bank has argued that Mr O'Neill's views are personal ones, but this has not satisfied the Glazers.