Contracts (Rights of Third Parties) Act 2001 s 6

s 6 Protection of promisor from double liability

6. Where under section 2, a term of a contract is enforceable by a third party, and the promisee has recovered from the promisor a sum in respect of —(a) the third party’s loss in respect of the term; or (b) the expense to the promisee of making good to the third party the default of the promisor, then, in any proceedings brought in reliance on that section by the third party, the court or arbitral tribunal must reduce any award to the third party to such extent as it thinks appropriate to take account of the sum recovered by the promisee.