21.6.—(1) The court may—
(a)shorten or extend (even after it has expired) a time limit under this Part;
(b)allow an application or notice to be in a different form to one set out in the Practice Direction, or to be made or given orally;
(c)dispense with a requirement for notice to introduce evidence of a defendant’s bad character.
(2) A party who wants an extension of time must—
(a)apply when serving the application or notice for which it is needed; and
(b)explain the delay.