Weights and Measures Act 1985

2 (1) This paragraph applies to any goods which, not being aerosol products and not themselves being goods—

(a) required by or under Part IV of this Act, except this paragraph, to be pre-packed only if the container is marked with an indication of quantity, or

(b) in the case of which when sold pre-packed (whether on any sale or on a sale of any particular description) the quantity of the goods sold expressed in a particular manner is required by or under Part IV of this Act, except this paragraph, to be made known to the buyer at or before a particular time, or

(c) expressly exempted by or under Part IV of this Act, except this paragraph, from all such requirements as mentioned in paragraph (a) or (b) above which would otherwise apply to them,

consist of a mixture constituted wholly or mainly of goods of one or more descriptions to which there applies any such requirement made by reference to any of the following (whether exclusively or otherwise), that is to say, weight, capacity measurement or volume.

(2) Subject to paragraph 5 below, goods to which this paragraph applies shall be pre-packed only if the container is marked with an indication of quantity either by net weight or by capacity measurement or by volume.