Chapter 4 of this text discusses the legal framework of trade unions in the UK after Brexit. The UK's withdrawal from the European Union (EU) has resulted in significant changes to the legal framework that governs trade unions in the UK, as much of the legal framework for trade unions working in UK companies was drawn from EU law before Brexit. This included the right to collective bargaining, protections against unfair dismissal for trade union activity, and the right to strike. The UK government now has more flexibility to create its own legislative framework for trade unions. However, there are concerns that workers' rights and protections may be weakened as a result of these changes. The Trade Union Act 2016, a key piece of law that controls trade unions in the UK, has changed after Brexit, making it harder for trade unions to engage in industrial action by introducing new restrictions on strike votes and protesting.