24For the purposes of paragraphs 20 and 22—
(a)proceedings commence in a magistrates’ court when a warrant, requisition or summons relating to the proceedings is issued;
(b)proceedings commence on an appeal to the Crown Court when a notice of appeal is served;
(c)other proceedings commence in the Crown Court when they are committed, transferred or sent to that court;
(d)proceedings commence in the High Court when an application for leave to appeal by way of case stated is made or (in the absence of such an application) when notice of appeal is given;
(e)proceedings commence in the Court of Appeal when an application for leave to appeal is made or (in the absence of such an application) when notice of appeal is given;
(f)proceedings commence in the Supreme Court when an application for leave to appeal is made.