The claimant may start the proceeding if any of the following have happened—
(a) at least 6 months or, for a claimant with a terminal condition or to whom section 302 (1) (b) applies, 3 months have elapsed after—(i) the claimant has given, or is taken to have given, a complying notice of claim; or(ii) the insurer has waived the claimant’s noncompliance with the requirements of section 275 with or without conditions; or(iii) the court has made an order under section 297 or 298 ;
(b) the insurer has admitted liability, but is claiming contributory liability from the claimant, a contributor or another party, and the claimant has given the insurer written notice that the extent of the admission is disputed;
(c) the insurer has admitted liability but damages can not be agreed.