Tory Election manifesto 2017
Britain has always been a great trading nation. Trade will continue to be crucial to our future growth and prosperity. As we leave the European Union, we want to negotiate a new deep and special partnership with the EU, which will allow free trade between the UK and the EU’s member states. As part of the agreement we strike, we want to make sure that there are as few barriers to trade and investment as possible. Leaving the European Union also means we will be free to strike our own trade agreements with countries outside the EU.

In english this means No customs union with the EU