Bills of Exchange Act 1882: Primary legislation governing promissory notes in England and Wales. Defines legal requirements for valid promissory notes and their enforcement.

Law of Property Act 1925: Relevant for any security interests involved in the promissory note, particularly if the note is secured against property.

Limitation Act 1980: Establishes time limits for bringing claims, typically 6 years for simple contracts and promissory notes.

Consumer Credit Act 1974: Applies when the agreement involves consumer credit elements or when one party is an individual rather than a business.

Contract Law Principles: Common law fundamentals including offer, acceptance, consideration, intention to create legal relations, and capacity to contract.

Settlement Agreement Principles: Common law principles governing settlement agreements, including full and final settlement terms, waiver of claims, and release provisions.

Financial Services and Markets Act 2000: Regulatory framework applicable if the agreement involves regulated financial activities.

Money Laundering Regulations 2017: Regulatory requirements to consider if significant sums are involved in the settlement agreement.