Pharmaceutical Society of GB v Boots Cash Chemists (Southern) Ltd
Pharmaceutical Society of Great Britain v Boots Cash Chemists (Southern) Ltd [1953] EWCA Civ 6 is a famous English contract law decision on the nature of an offer. The court held that the display of a product in a store with a price attached is not sufficient to be considered an offer, and upheld the concept of an invitation to treat.
Source: Wikipedia — Pharmaceutical Society of GB v Boots Cash Chemists (Southern) Ltd (CC BY-SA 4.0)