http://www.legislation.gov.uk/ukpga/1999/26/section/2/1999-10-25Employment Relations Act 1999An Act to amend the law relating to employment, to trade unions and to employment agencies and businesses.1999-08-07texttext/xmlenStatute Law Database2024-02-051999-10-25 Trade unions2 Detriment related to trade union membership.Schedule 2 shall have effect.