Bills of Exchange Act 1882: Fundamental legislation governing negotiable instruments including promissory notes. Section 83 defines promissory notes and sets out formal requirements for validity.

Consumer Credit Act 1974: Regulates consumer credit agreements, imposes specific documentation requirements and provides consumer protections when the borrower is an individual.

Limitation Act 1980: Sets time limits for enforcing the note (6 years for simple contracts) and affects the enforceability period.

Financial Services and Markets Act 2000: May be relevant if the promissory note is part of a regulated financial activity.

Unfair Contract Terms Act 1977: Applies to contractual terms and ensures fairness in contract terms for promissory notes.

Statute of Frauds 1677: Sets out requirements for written evidence of the debt.

Contract Law Fundamentals: Common law principles covering consideration, intention to create legal relations, and capacity to contract.

Doctrine of Incorporation: Common law principles determining how terms are effectively incorporated into the promissory note.