The history of labour and trade union law reflects progress ranging from fewer restrictions to more restrictions on trade union power. During the Great Depression, Congress passed a large number of laws to help the unemployed and combatants, including a multitude of New Deal laws. Congress also passed the National Labor Relations Act of 1935 (commonly known as the Wagner Act), which gave workers the right to organize, join unions, strike and bargain collectively. The trade union movement has had clear advantages in terms of the transfer of the decision-making place on the recognition of trade unions from the economic scene to the political scene. By guaranteeing the right of exclusive representation for at least one year after certification, the union had the opportunity to extend its influence on the bargaining unit. A logical extension of this recognition has been to strengthen the union`s membership base and revenue streams. Instead of adopting a policy of political appeal that includes a closed store with a union with limited membership, most unions preferred to adopt an inclusive policy attitude. They were negotiating union security clauses to expand membership rather than restrict it. The end result was a growth in closed store arrangements. All forms of closed trade in the UK are illegal after the introduction of the Employment Act in 1990.
They were further reduced under Section 137 (1) (a) of the Trade Union and Labour Relations (Consolidation) Act 1992 (approximately 52) , which was passed at the time by the Conservative government. The then-opposition Labour Party had supported closed operations until December 1989, when it abandoned the policy in accordance with EU law.  Equity was one of the last unions in the UK to make a store closed before entry until the 1990 Act.  A closed store, in union management relations, an agreement whereby an employer agrees to hire only people – and employ – who are members with a good union reputation. Such an agreement is governed by the terms of an employment contract. A store closed before entry (or a simple closed store) is a form of union security agreement under which the employer undertakes to recruit only union members and workers must remain members of the union at all times to remain employed. This is different from a closed company after entry (Us: Union Shop) which is an agreement that requires all workers to join the union if they are not already members.  In a union activity, the union must accept as a member any person hired by the employer.
 Section 8 (a) (3) of the Taft-Hartley Act expressly prohibited the closed store, but authorized a collective agreement for a union shop, provided certain guarantees were fulfilled. Subject to the union, a union and an employer could agree that workers must join the union within 30 days of employment to keep their jobs. Section 8 A (3) states in a relevant section that a closed store is a workplace where anyone hoping for a job must first join a union.