Limitation Act 1980: Primary legislation governing statutory time limits for different types of claims. Sets 6-year limitation period for standard contract claims and 12 years for specialty debts. Critical for determining deadline validity in demand letters.

Late Payment of Commercial Debts (Interest) Act 1998: Legislation governing business-to-business debts, providing statutory rights to claim interest and fixed compensation for recovery costs in commercial transactions.

Consumer Credit Act 1974: Key legislation for consumer-related debts, outlining special requirements for consumer notices and specific information that must be included in formal communications.

Civil Procedure Rules (CPR): Procedural rules governing civil litigation in England and Wales, including pre-action protocols and requirements that must be followed before initiating court proceedings.

Contract Law Principles: Fundamental legal principles governing contractual relationships, including requirements for valid claims, contractual notice requirements, and payment term provisions.

Law of Property Act 1925: Legislation relevant when debt is secured against property, governing the relationship between property rights and debt collection processes.