Consumer Credit Act 1974: Regulates consumer credit agreements, including loans exceeding £140,000 or for business purposes. Sets requirements for agreement form and content, and establishes rights and obligations of all parties.

Limitation Act 1980: Establishes time limits for bringing claims, typically 6 years for loan agreements. Critical for enforcement provisions in the agreement.

Law of Property Act 1925: Governs situations where loans are secured against property, including documentation requirements and registration procedures.

Financial Services and Markets Act 2000: Covers regulations regarding financial arrangements, including specific exemptions for family arrangements.

Contracts (Rights of Third Parties) Act 1999: Determines rights of third parties to enforce contract terms, particularly relevant for guarantors or co-signers in family loan agreements.

Common Law Principles: Fundamental legal principles including consideration, intention to create legal relations, and capacity to contract.

Unfair Contract Terms Act 1977: Ensures terms in agreements are fair and reasonable, with particular importance in family contexts.

Mental Capacity Act 2005: Ensures all parties have the mental capacity to enter into agreements, particularly relevant when elderly family members are involved.