“The court can make an order appointing a person to represent any other person or persons in the claim where the person or persons to be represented…” and then (d) says: “…are a class of persons who have the same interest in a claim” and (i) says: “one or more persons of that class are within subparagraphs (a), (b) or (c)” -- that is, persons who are unborn, cannot be found, or cannot easily be ascertained -- or (ii) “to appoint a representative would further the overriding objective.”
“The court’s approval is required to settle a claim in which a party is acting as a representative under this rule”. (6): “The court may approve a settlement where it is satisfied that the settlement is for the benefit of all represented parties”