Few people outside the UK realise that six years have already passed in June this year since the day the British people decided in a referendum to leave the structures of the European Union. Global events of recent years, such as the COVIDCovid-19 pandemic or the outbreak of war in Ukraine, have slightly overshadowed the media attention directed towards the UK’s withdrawal. However, the phenomenon of Brexit still continues to have far- reaching implications for every sector of the economy, with wide- reaching consequences for everyday life. These effects will certainly remain with us for many decades to come. Therefore, the question of the separation of long and deeply integrated economies has become the focus of social, economic and legal research.