In this paper we raise a number of issues that are important for the UK to consider in the light of its decision to leave the European Union (EU). The first of these is the nature of the EU Single Market in Electricity and Gas and the UK’s role within this. The second is the nature of UK energy policy in the light of Brexit, and the opportunities for changing this. And third, we consider some of the key issues to be addressed in a negotiating position with the EU.