20.11—(1) This rule applies if—
(a)the Part 20 claim is not—
(i)a counterclaim; or
(ii)a claim by a defendant for contribution(GL) or indemnity(GL) against another defendant under rule 20.6; and
(b)the party against whom a Part 20 claim is made fails to file an acknowledgment of service or defence in respect of the Part 20 claim.
(2) The party against whom the Part 20 claim is made—
(a)is deemed to admit the Part 20 claim, and is bound by any judgment or decision in the main proceedings in so far as it is relevant to any matter arising in the Part 20 claim;
(b)subject to paragraph (3), if default judgment under Part 12 is given against the Part 20 claimant, the Part 20 claimant may obtain judgment in respect of the Part 20 claim by filing a request in the relevant practice form.
(3) A Part 20 claimant may not enter judgment under paragraph (2)(b) without the court’s permission if—
(a)he has not satisfied the default judgment which has been given against him; or
(b)he wishes to obtain judgment for any remedy other than a contribution(GL) or indemnity(GL).
(4) An application for the court’s permission under paragraph (3) may be made without notice unless the court directs otherwise.
(5) The court may at any time set aside(GL) or vary a judgment entered under paragraph (2)(b).