Including the Open University in your analysis of A-level grades of university entrants (Analysis, 色盒直播S , June 7), would have confounded your pre and post-1992 universities dichotomy. Since its foundation in 1971, it has had no entry requirements for undergraduate degrees. It would be bottom of the league - or the top, depending on your view.
Jan Walmsley
Dean, School of Health and Social Welfare
Open University