Changes made by Weights and Measures Act 1963 (Various Foods) 1985
S.I. 1985/1980
Made to Weights and Measures Act 1963 (Cheese, Fish, Fresh Fruits and Vegetables, Meat and Poultry) 1984
2 changes. All changes made by Weights and Measures Act 1963 (Various Foods) 1985
From legislation.gov.uk's record of changes, the official one: see it there.