Which UK law introduced the requirement for the remuneration for women's employment to come into line with that set for men doing the same job?

The Equal Pay Act 1970 is an Act of the United Kingdom Parliament which prohibits any less favourable treatment between men and women in terms of pay and conditions of employment. The Act has now been mostly superseded by Part 5, chapter 3, of the Equality Act 2010.

In the 1959 General Election, the Labour Party's Manifesto had proposed a charter of rights including 'the right to equal pay for equal work'. September 1965 saw the Trades Union Congress resolving 'its support for the principles of equality of treatment and opportunity for women workers in industry, and calls upon the General Council to request the government to implement the promise of 'the right to equal pay for equal work' as set out in the Labour Party election manifesto'. However, there was no immediate action by either government or unions.

Brian Harrison says polls in 1968–69 showed public opinion was moving strongly in favour of equal pay for equal work; nearly three-quarters of those polled favoured the principle. A trigger cause for the introduction of the legislation was the 1968 Ford sewing machinists strike, though the legislation also paved the way for the UK's entry to the European Community, helping to bring it towards conformity with Article 141 of the Treaty of Rome, which says that 'each Member State shall ensure that the principle of equal pay for male and female workers for equal work or work of equal value is applied.'. The Act came into force on 29 December 1975.