Unfair Contract Terms Act 1977 (UCTA): Key legislation that restricts the extent to which liability can be excluded or limited. Prohibits exclusion of liability for death or personal injury caused by negligence. Other exclusions must pass the 'reasonableness test'.

Consumer Rights Act 2015: Governs consumer contracts, providing rules about unfair terms and requiring transparency and prominence of terms. Particularly relevant if the waiver involves consumers rather than businesses.

Construction (Design and Management) Regulations 2015 (CDM): Establishes statutory duties that cannot be waived, including health and safety obligations and specific responsibilities for different parties in construction projects.

Contracts (Rights of Third Parties) Act 1999: Addresses the rights of third parties who might be affected by the contract and provides the option to explicitly exclude third party rights.

Occupiers' Liability Acts 1957 and 1984: Defines duties owed to visitors and trespassers on construction sites. Certain basic duties of care cannot be completely excluded.

Common Law Principles: Encompasses the doctrine of fundamental breach, rules about incorporation of terms, and the contra proferentem rule for interpreting ambiguous terms.

Housing Grants, Construction and Regeneration Act 1996: Establishes payment provisions and adjudication rights in construction contracts that cannot be waived.