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, but rather is an invitation to treat.
Facts.
Boots Cash Chemists had just instituted a new way for its customers to buy certain medicines. Shoppers could now pick drugs off the shelves in the chemist and then pay for them at the till. Before then, all medicines were stored behind a counter meaning a shop employee would get what was requested. The Pharmaceutical Society of Great Britain objected and argued that under the Pharmacy and Poisons Act 1933, that was an unlawful practice. Under s 18(1), a pharmacist needed to supervise at the point where "the sale is effected" when the product was one listed on the 1933 Act's schedule of poisons. The Society argued that displays of goods were an "offer" and when a shopper selected and put the drugs into their shopping basket, that was an "acceptance", the point when the "sale is effected"; as no pharmacist had supervised the transaction at this point, Boots was in breach of the Act. Boots argued that the sale was effected only at the tills.
Subsequent legal developments.
This case upheld the legal concept of invitation to treat.