(1) At the first hearing the judge must give any directions that may be required to ensure the expeditious and just trial of the claim and the provisions of Parts 25 to 27 of these Rules apply.
(2) In particular the judge may —
(a) allow any person or body appearing to have sufficient interest in the subject matter of the claim to be heard whether or not served with the claim form;
(b) direct whether any person or body having such interest —
(i) is to make submissions by way of written brief, or
(ii) may make oral submissions at the hearing;
(c) allow the claimant to —
(i) add or substitute a claim for relief other than an administrative order,
(ii) amend any claim for an administrative order, or
(iii) substitute another form of application for that originally made;
(d) direct that claims by one or more persons or bodies or against one or more persons in respect of the same office made on the same grounds be consolidated or heard together; and
(e) make orders for —
(i) witness statements or affidavits to be served,
(ii) cross-examination of witnesses, and
(iii) disclosure of documents.
(3) The judge may grant such interim relief as appears just.