The article is devoted to the analysis of an emergency EU summit held in Brussels on November 25, 2018. This summit is one of the key points in the process of leaving the UK from the European Union, which should begin with a transition period on March 29, 2019. At the summit, the leaders of 27 European countries (EU27) discussed a draft treaty that would regulate relations between the United Kingdom and the European Union after the start of the transition period.