The UK will pay as a member for the entire duration of the current long-term budget until the end of 2020. After 2020, it will bring what remains to be liquidated under the long-term budget or previous commitments. These clarify what applies to a number of ongoing proceedings, rights granted, etc. at the end of the transition period. The agreement covers issues such as money, civil rights, border regulation and dispute settlement. It also includes a transition period and an overview of the future relationship between the UK and the EU. It was published on 14 November 2018 and was the result of the Brexit negotiations. The agreement was approved by the heads of state and government of the remaining 27 EU countries and the British government of Prime Minister Theresa May, but met with resistance in the British Parliament, whose approval was required for ratification. The consent of the European Parliament would also have been required. On 15 January 2019, the House of Commons rejected the Withdrawal Agreement by 432 votes to 202.  The House of Commons again rejected the agreement on March 12, 2019 by 391 votes to 242 and rejected it a third time on March 29, 2019 by 344 votes to 286. On 22 October 2019, the revised withdrawal agreement negotiated by the Boris Johnson government was published in the first stage in Parliament, but Johnson suspended the legislative process when the accelerated approval programme did not find the necessary support and announced his intention to call a general election.  On 23 January 2020, Parliament ratified the agreement by adopting the Withdrawal Agreement.
On 29 January 2020, the European Parliament approved the Withdrawal Agreement. It was then finalised by the Council of the European Union on 30 January 2020. With regard to the Irish border issue, there is a protocol on Northern Ireland (the ”backstop”) which is annexed to the agreement and sets out a fallback position that will only enter into force if no other effective arrangement is demonstrated before the end of the transition period. If this happens, the UK will eclipse the EU`s common external tariff and Northern Ireland will remain in some aspects of the single market until such a demonstration is achieved. None of the parties can unilaterally withdraw from this customs union.