 The Foundation is the authorised staffing establishment of the cathedral, few of whom are clergy.The head of the cathedral is the Dean, currently Robert Willis, who is assisted by a chapter of 30 canons, four of whom are residentiary, the others being honorary appointments of senior clergy in the diocese.There are also a number of lay canons who all together form the greater chapter which has the legal responsibility both for the cathedral itself and also for the formal election of an archbishop when there is a vacancy-in-see.