slip rule(Obviously a procedural slip had occurred, but the Court of Appeal refused to apply the ‘slip rule' in CPR 3.10 which provides: ‘where there has been an error of procedure such as a failure to comply with a rule or Practice Direction (a) the error does not invalidate any step taken in the proceedings unless the court so orders; and (b) the court may make an order to remedy the error'. CME Alexander Demidov)
