Competition Act 1998: Key legislation governing anti-competitive behavior, including Chapter I and II prohibitions. Essential for ensuring exclusivity provisions don't constitute unlawful market restrictions.

Sale of Goods Act 1979: Fundamental legislation covering commercial sales aspects including title, description, quality, and fitness for purpose in goods transactions.

Unfair Contract Terms Act 1977: Controls the use of exclusion and limitation clauses in contracts, ensuring fairness in contractual relationships.

Consumer Rights Act 2015: Relevant if the agreement has any B2C elements, providing consumer protection and rights in commercial transactions.

Misrepresentation Act 1967: Governs false statements made during contract formation and provides remedies for misrepresentation.

Retained EU Competition Law: Post-Brexit application of Article 101 TFEU principles and Vertical Agreements Block Exemption Regulation (VABER), including market share thresholds.

Common Law Doctrine of Consideration: Fundamental principle requiring exchange of value between parties for contract validity.

Common Law Principles of Offer and Acceptance: Basic contractual formation principles determining how and when a valid contract is formed.

Food Safety Act 1990: Specific legislation applicable if the exclusive purchasing agreement involves food products.

Consumer Protection Act 1987: Relevant if the agreement involves consumer goods, providing protection against defective products.