This document is drafted for England and Wales, and that scope is deliberate rather than incidental. There is no such thing as a single body of UK cohabitation law, and applying an England and Wales agreement to a Scottish or Northern Irish relationship is a genuine risk rather than a technicality.
In Scotland, cohabitants already have limited statutory rights under the Family Law (Scotland) Act 2006, which allows a former partner to apply to the court for a financial payment on separation within a strict time limit. Scottish couples typically formalise arrangements through a minute of agreement, which can be registered in the Books of Council and Session for preservation and execution, giving it a force this template does not replicate. A cohabitation agreement written for England and Wales does not map onto that regime and should not be used north of the border.
In Northern Ireland, the position is closer to England and Wales, with no common law marriage and property disputes resolved through trust and property principles, but the procedural detail and court practice differ enough that separate advice is sensible. Within England and Wales itself, the practical variation is not regional but factual: couples in high-value housing markets such as London face larger equity stakes and more contested TOLATA claims, which raises the premium on precise drafting. If your circumstances straddle jurisdictions, for example a home in one country and a partner resident in another, the agreement should record which law governs it, and you may need parallel documents. When in doubt, treat the border as a hard line rather than a formality.