Brexit may be coming, but the terms are far from clear. In the range between the Norwegian model (membership in the customs union and single market without political participation) and a hard Brexit severing all ties with the EU, and even the long run dissolution of the United Kingdom, anything is possible. History rarely repeats itself, but some structures have a long life, writes Stefan Collignon (LSE). He argues that one of the fascinating features of the Brexit vote in 2016 was that it reflected the old trenches of the English Civil War in the 17th century.