Companies Act 2006: Primary legislation governing corporate authority, directors' duties (Sections 171-177), company decision-making processes, and requirements for board resolutions

Statute of Frauds 1677: Historical legislation that requires guarantees to be made in writing and signed to be legally enforceable

Law of Property (Miscellaneous Provisions) Act 1989: Modern contract law legislation that governs the formation and execution of contracts, including guarantees

Ultra Vires Doctrine: Legal principle concerning corporate capacity and whether actions are within the company's powers as defined in its constitutional documents

Articles of Association: Company's constitutional documents that define board powers, limitations, and delegation of authority rules

Financial Services and Markets Act 2000: Regulatory framework for financial services activities, relevant if the guarantee involves regulated activities

Insolvency Act 1986: Legislation covering fraudulent trading, wrongful trading, and transaction avoidance provisions in relation to corporate insolvency

Consumer Credit Act 1974: Legislation governing consumer credit arrangements, applicable if the guarantee involves consumer credit aspects