1) Beswick v Beswick established that a third party can enforce a contract if they are intended beneficiaries, as determined by the language and circumstances of the agreement. The widow was entitled to specific performance of payments promised to her after her husband's death.
2) Trident General Insurance v McNiece expanded exceptions to privity to allow subcontractors to claim under liability policies where they were intended beneficiaries. The court applied theories of unjust enrichment, reliance, and trusteeship.
3) Coulls v Bagot's Executor affirmed privity by restricting claims to parties that provided consideration, denying a widow benefits after her husband's death as she did not personally provide consideration.