Agency and trust relationships are ubiquitous in modern finance, and it is therefore essential that any interactions between the two strands of law are properly understood. The recent judgment of the Court of Appeal in National Iranian Oil Company v Crescent Gas Corporation Limited [2025] EWCA Civ 1211 is an intriguing modern example of such an interaction, engaging in the context of s 53(1)(b) of the Law of Property Act 1925.