Price tag is invitation to treat,
Pharmaceutical Society Of Great Britain v Boots Cash Chemists (1953)
Promissory estoppel
Central London Property Trust V High Trees House (1947) _ The High Trees Case
Bette Davis restrained from breaking an agreement not to act for anyone other than claimants. Not seen as compelling her to work for claimants which would have been unenforecable
Warner Brothers Pictures Inc. v. Nelson (1936)