結社自由
The rights to freedom of association and freedom of assembly are central to the functioning of democracy because they are the basis for political organisation and discourse. Political parties, trade unions, social campaign groups, and businesses all associate freely in democratic societies, and take action upon that freedom, including through assemblies, strikes, or protests. Also protected in international law, the European Convention on Human Rights article 11 states: "Everyone has the right to freedom of peaceful assembly and to freedom of association with others" including joining "trade unions for the protection of" one's interests. Like with other rights, freedom of association cannot be restricted without a lawful justification that is further than necessary in a democratic society, to protect security, safety, health or other people's rights. Freedom of association involves three main principles. First, there is a right to suffer no disadvantage for associating with others, for instance, because if an employer penalises workers for joining a trade union. Second, one must be able to associate with others on the terms one wishes so that, for example, a political party or a trade union must be able to admit or expel members based on their political values and actions. Third, there is a right to act upon the goals of the association, for instance by campaigning for election as a political party, or as a trade union collectively bargaining with an employer for better wages or if necessary going on strike. British law generally imposes no restriction on people forming groups for political purposes, with the significant exception of organisations banned under the Terrorism Act 2000, such as the neo-Nazi white hate group National Action or Jihadi fundamentalists in Al Qaeda.