Statute of Frauds 1677: Section 4 requires guarantees to be in writing and signed to be enforceable. The release of a guarantee should similarly be properly documented in writing.

Law of Property (Miscellaneous Provisions) Act 1989: Section 1 requires certain documents to be executed as deeds. Consideration needed whether the release should be executed as a deed to avoid any issues with consideration.

Common Law Contract Principles: Fundamental principles including consideration requirements, capacity of parties, and intention to create legal relations must be considered in the release agreement.

Companies Act 2006: If any party is a company, must consider execution requirements, authority requirements, and company capacity issues.

Financial Services and Markets Act 2000: Relevant if the guarantee relates to regulated financial activities, ensuring compliance with financial services regulations.

Insolvency Act 1986: Important for considering if release could be challenged as a preference or transaction at undervalue, and the impact of any insolvency proceedings.

Unfair Contract Terms Act 1977: Ensures that no terms in the release agreement could be considered unfair or unreasonable under the Act.

Consumer Rights Act 2015: Applicable if any party to the release is acting as a consumer rather than in business capacity, ensuring consumer protection provisions are met.