The binding legal principles established are: (1) A refusal of postponement for legal representation is a matter of judicial discretion, and on appeal the question is whether that discretion was exercised judicially and whether the refusal resulted in substantial miscarriage of justice; (2) Where an accused pleads guilty and admits all essential elements of an offence, the absence of legal representation does not necessarily amount to a miscarriage of justice; (3) In sexual offences involving minors under section 3(a) of the Criminal Law Amendment Act, where the accused is the victim's class teacher, the court may properly infer knowledge of the victim's age given the teacher-pupil relationship; (4) All essential elements of an offence must be canvassed during guilty plea proceedings, including the accused's knowledge at the time of commission of the offence (not merely at trial).