Liability for Defective Products Act 1991
5.— (1) For the purposes of this Act a product is defective if it fails to provide the safety which a person is entitled to expect, taking all circumstances into account, including—
( a) the presentation of the product,
( b) the use to which it could reasonably be expected that the product would be put, and
( c) the time when the product was put into circulation.
(2) A product shall not be considered defective for the sole reason that a better product is subsequently put into circulation.