The court office at the request of the claimant must enter judgment for failure to defend if —
(a) (i) the claimant proves service of the claim form and statement of claim or proves that service is dispensed with, or
(ii) an acknowledgment of service has been filed by the defendant against whom judgment is sought;
(b) the period for filing a defence and any extension agreed by the parties or ordered by the court has expired;
(c) the defendant has not —
(i) filed a defence to the claim or any part of it (or the defence has been struck out or is deemed to have been struck out under rule 22.1(6)), or
(ii) (if the only claim is for a specified sum of money) filed or served on the claimant an admission of liability to pay all of the money claimed, together with a request for time to pay it; or
(iii) satisfied the claim on which the claimant seeks judgment;
(d) (where necessary) the claimant has the permission of the court to enter judgment; and
(e) the claim is not a claim listed under rule 12.2 in which default judgment may not be obtained.