The British land authority HM Land Registry has published a new practical guide dedicated to contractual control agreements over property assets. The guidance is primarily addressed to conveyancers—professionals who conduct property transactions—as well as a broader range of real estate market participants. The document clarifies new requirements that come into force regarding such agreements and is intended to help industry professionals prepare for the changes in advance. Contractual control refers to situations where one party gains the ability to influence the use or disposition of land through contractual mechanisms without formally registering direct ownership rights, which previously could remain less transparent to market participants and regulators. The publication of the guidance is considered part of efforts to increase transparency in land and property transactions in the United Kingdom. The new requirements are expected to enable more accurate recording of information about such contractual relationships in registers, which should reduce risks for buyers, investors, and other interested parties. HM Land Registry recommends that property professionals familiarize themselves with the material in advance so they can properly advise clients and promptly adapt internal processes to the new rules.