On 15 January 2019, the House of Commons voted with 230 votes against the Brexit withdrawal agreement the largest vote against the British government in history.  The government may survived a vote of confidence the next day.  On March 12, 2019, the House of Commons voted 149 votes against the agreement, the fourth-biggest defeat of the government in the history of the House of Commons.  A third vote on the Brexit withdrawal agreement, widely expected on 19 March 2019, was rejected by the House of Commons spokesman on 18 March 2019, on the basis of a parliamentary convention of 2 April 1604, which prevented British governments from forcing the House of Commons to vote several times on a subject already voted on by the House of Commons.    An abbreviated version of the withdrawal agreement, in which the annex political statement had been withdrawn, consisted of the test of „substantial amendments,“ so that a third vote was held on 29 March 2019, but was rejected by 58 votes.  The Brexit withdrawal agreement, officially titled the Uk`s withdrawal agreement from great Britain and Northern Ireland from the European Union and the European Atomic Energy Community, is a treaty signed on 24 January 2020 between the European Union (EU), Euratom and the United Kingdom (Uk) which sets the conditions for the UK`s withdrawal from the EU and Euratom. The text of the treaty was published on 17 October 2019 and is a renegotiated version of an agreement published six months earlier. The previous version of the withdrawal agreement was rejected three times by the House of Commons, leading Queen Elizabeth II to accept Theresa May`s resignation as Prime Minister of the United Kingdom and appoint Boris Johnson as the new Prime Minister on 24 July 2019. The British Parliament approved the draft agreement by adopting on 23 January 2020 the implementing laws (the 2020 Withdrawal Agreement Act) of the European Union (withdrawal agreement).
Following the signing of the agreement, the UK Government adopted and tabled the UK`s ratification instrument on 29 January 2020.  The agreement was ratified by the Council of the European Union on 30 January 2020, after approval by the European Parliament on 29 January 2020. The UK`s withdrawal from the EU came into force on 31 January 2020 at 11 .m GMT, when the withdrawal agreement came into force in accordance with Article 185. On 22 October 2019, the House of Commons agreed, by 329 votes to 299, to give a second reading to the revised withdrawal agreement (negotiated by Boris Johnson earlier this month), but when the accelerated timetable it had proposed did not receive the necessary parliamentary support, Johnson announced that the law would be overturned.   In the 2019 revisions, elements of the political statement were also adapted, replacing the word „appropriate“ with „appropriate“ with respect to labour standards. According to Sam Lowe, a trade fellow at the Centre for European Reform, the amendment excludes labour standards from dispute resolution mechanisms.  In addition, the Equal Competition Mechanism has been postponed from the legally binding withdrawal agreement to the political declaration, and the line of the political statement that „the United Kingdom will consider taking into account alignment with trade union rules in the relevant areas“ has been removed.  On the issue of the Irish border, there is a protocol on Northern Ireland (the „backstop“) which is attached to the agreement and establishes a position of withdrawal that will only come into force if effective alternative arrangements are not demonstrated before the end of the transitional period.