The UK will leave the EU Customs Union and Single Market on March 29, 2019. Both partners are aiming to conclude an ambitious free trade agreement, which would govern the exchange of goods and services between them after the UK exits the Union. However, the definition of the future EU-UK relationship depends on the resolution of the Withdrawal Agreement, which is the deal that will define the conditions under which the UK will leave the EU, such as the Northern Ireland border and the rights of citizens. The negotiations surrounding the Withdrawal Agreement have been challenging, to say the least, and the internal division in UK politics further complicates the process. Time is pressing, as negotiator estimate the Withdrawal Agreement must be concluded by October 2018 to allow time for formal ratification in the EU and in the UK. If there is no ratified Withdrawal Agreement in place by March 29, 2019, the UK will leave the EU with no deal and will immediately become a third country.