[Civil Procedure – appeal against two registrar’s decision – (i) granting leave to amendment defence and counterclaim, including joinder of third party – (ii) direction that expert evidence proceed via single joint expert – plaintiffs opposed amendments as late, inconsistent with earlier pleadings, introducing new causes of action, prejudicial, and potentially time-barred – defendants argued amendments were necessary to ventilate real issues, supported by equitable and limitation exceptions, and permissible under O.20 r.5 SCR – registrar found no irremediable prejudice and allowed amendments – plaintiffs also challenged joint expert order, contending right to own expert and simultaneous exchange of reports – defendants supported registrar’s discretion under O.40 r.2(1) SCR for efficiency and proportionality – court held registrar acted within powers in both decisions – appeals dismissed and registrar’s orders affirmed.]
