"… is normally either at the Magistrates' Court or immediately on arrival in the Crown Court – whether at a preliminary hearing or by way of a locally-approved system for indicating plea through his solicitors. There will, we think, ordinarily be some, but limited, difference in public benefits between the two stages of the Magistrates' Court and the first arrival in the Crown Court, but for practical purposes either can properly, we think, ordinarily attract the maximum percentage reduction (one third) provided for by the SGC Guidelines."