(1) An application for an order under rule 23.8 or 23.9 must be served on every person on whom, in accordance with rule 5.10 (service on minors or patients) the claim should have been served.
(2) An application for an order under rule 23.9 (courts power to terminate appointment of and substitute next friend) must also be served on the person who —
(a) is or purports to act as next friend; and
(b) it is proposed should act as next friend if that person is not the applicant.
(3) On an application for an order under rule 23.8 or 23.9, the court may appoint the person proposed or any other person.