LyrArc Article Gist
This editorial in the WSJ points out that it is not enough for a country to vote to leave the European Union. It must be ready to leave the EU, as it says happened in the case of Greece. Greece was willing to leave the EU but not capable of going it alone. This is true of Britain as Britain cannot bear the economic cost of losing the advantages of trade and commerce without serious consequences. Mrs. May's deal for a permanent customs union, a trade deal that mimics Norway's one with the EU, is not fully supported within her own party. Preserving relations with Ireland and Northern Ireland are important and some Brexit Leave leaders have alienated the Irish. 

As the WSJ puts it GDP growth obscured regional disparities and shortfalls in productivity and innovation- so that businesses are right to warn of the consequnces of a hasty Brexit or a no deal Brexit. In short, Britain cannot afford to lose the trade benefits of EU membership. This should have been known from the beginning on all sides to avoid what has been a 2 year long fiasco which will affect Britain's future. A strategic error has been made by Brexit supporters in not thinking things through before launching out into the referendum.