The historic economic goal of the European Union to achieve an internal market has led to the use of many instruments, one of them being Article 34 of the Treaty of the Functioning of the European Union. This article will explore the substantial impact on consumers, producers and the regulatory autonomy of member states that an economically liberalist driven approach to Article 34 has had. Furthermore, the importance of Article 34 for the UK will be examined in light of its current reliance on it, and how the UK’s departure from the European Union may influence its capacity to depend on Article 34.