The Trade Union and Labour Relations (Consolidation) Act 1992 is a UK act of Parliament which regulates United Kingdom labour law. The act applies in full in England and Wales and in Scotland, and partially in Northern Ireland.
The law contained in the act has existed in more or less the same form since the Trade Disputes Act 1906. Underneath a mass of detail, four main principles can be found in the main parts of the act. The act's effect is to
define trade unions and state they are the subjects of legal rights and duties
protect the right of workers to organise into, or leave, a union without suffering discrimination or detriment
provide a framework for a union to engage in collective bargaining for better workplace or business standards with employers From Wikipedia