In Maharaj v National Energy Corporation of Trinidad and Tobago (2019) UKPC 5 the Privy Council considered provisions resembling those in England and Wales relating to delay in making an application for leave to apply for judicial review, and, in particular, the precise significance of the presence, or absence, of prejudice to the rights of any person, or detriment to good administration, resulting from the grant of leave, or of any relief. Lord Lloyd-Jones said:-
“26. The classic exposition of the approach to delay in applications for judicial review in England and Wales is to be found in the speech of Lord Goff of Chieveley in Caswell. … even if there is good reason for extending time, the court may still refuse leave on grounds of prejudice or detriment. Caswell concerned the inter-relationship of section 31 of the Supreme Court Act 1981 and RSC Order 53, rule 4.2 Lord Goff agreed with the reasoning and conclusion of Ackner LJ in Jackson that even though a court may be satisfied that there was good reason for the failure to apply promptly or within three months, the delay, viewed objectively, remains “undue delay” and the court therefore retains a discretion to refuse to grant leave or the relief sought on the substantive application on the grounds of delay if it considers that it would be likely to cause substantial hardship or prejudice or would be detrimental to good administration. … The court, however, had the power to grant leave despite the fact that the application was late if it considered that there was good reason to exercise that power. … Read more »