Consumer Credit Act 1974: Primary legislation for consumer credit agreements, covering credit agreement requirements, form and content specifications, cooling-off periods, and cancellation rights. Essential when the installment agreement is with a consumer.

Consumer Rights Act 2015: Key legislation governing consumer contracts, establishing requirements for fair terms, transparency obligations, and general consumer protection provisions.

Unfair Contract Terms Act 1977: Regulates the limitations on exclusion clauses and establishes reasonableness requirements for contract terms in both consumer and business contracts.

Late Payment of Commercial Debts (Interest) Act 1998: Relevant for business-to-business installment agreements, establishing statutory interest rates and compensation for late payments.

Consumer Protection from Unfair Trading Regulations 2008: Legislation prohibiting unfair commercial practices and ensuring transparency in financial dealings with consumers.

Financial Services and Markets Act 2000: Regulatory framework for financial activities, including requirements and permissions for regulated financial agreements.

General Data Protection Regulation (GDPR) and Data Protection Act 2018: Legal framework for handling personal data, including requirements for privacy notices and consent in financial agreements.

Limitation Act 1980: Establishes time limits for bringing claims and is relevant for enforcement provisions in installment payment agreements.