Article 6 Right of appellant to be present
(1)
Except as provided by this article, an appellant shall be entitled to be present, if he wishes it, on the hearing of his appeal, although he may be in custody.
(2)
A person in custody shall not be entitled to be present—
(a)
where his appeal is on some ground involving a question of law alone;
(b)
on an application by him for leave to appeal;
(c)
on any proceedings preliminary or incidental to the appeal;
unless the Court of Appeal give him leave to be present.