This triggered Article 50 of the Treaty on European Union, which sets out the procedure for the withdrawal of a Member State from the Union and introduces a two-year countdown to withdrawal. On 23 January 2020, the UK Parliament approved the draft agreement by passing the European Union (Withdrawal Agreement) Act 2020. Following the signing of the Agreement, the Government of the United Kingdom issued and deposited the instrument of ratification of Great Britain on 29 January 2020.   The agreement was ratified by the Council of the European Union on 30 January 2020 after obtaining the consent of the European Parliament on 29 January 2020. The withdrawal of the United Kingdom from the Union entered into force on 31 January 2020 at 11 .m GMT, and on that date the Withdrawal Agreement under Article 185 entered into force. Most of these instruments were to be used on the day of release (31. January 2020, 11 p.m.). However, the Withdrawal Agreement postpones the entry into force of these instruments to the end of the transition period, also known as the “closing day of the investigation period” (defined as 31 December 2020 at 11 p.m.). The transitional period shall not be extended. The UK has said it does not want an extension. The option of an extension has been included in the Withdrawal Agreement.
The UK and the EU had until 1 July 2020 to agree on a possible extension. 7.Insert in accordance with Article 78 – Guarantees under the EU Withdrawal Agreement. Following an agreement between the two chambers on the text of the law, he received the royal convention on 23 January. Royal Consent is the consent of the monarch to make the bill an Act of Parliament (Law). The United Kingdom (UK) left the European Union (EU) on 31 January 2020 at midnight Central European Time (23:00 GMT). On the EU side, the European Parliament also approved the ratification of the agreement on 29 January 2020 and the Council of the European Union approved the conclusion of the agreement by email on 30 January 2020.  As a result, the European Union also deposited its instrument of ratification of the Agreement on 30 January 2020, thus concluding the Agreement, allowing it to enter into force at 11.m GMT on 31 January 2020 on the date of the Withdrawal of the United Kingdom from the Union. The UK Parliament decides that a further extension of the Brexit date is necessary as it wants to review the relevant legislation before voting on the Withdrawal Agreement. The British government then called on the EU to postpone the Brexit date to 31 January 2020. The 2019 revisions also adapted elements of the political declaration, replacing the word “appropriate” with “appropriate” in relation to labour standards.
According to Sam Lowe, a trade researcher at the Centre for European Reform, the change excludes labour standards from dispute resolution mechanisms.  In addition, the level playing field mechanism has been moved from the legally binding Withdrawal Agreement to the Political Declaration and the line in the Political Declaration that “the UK will consider aligning itself with EU legislation in relevant areas” has been deleted.  The agreement covers issues such as money, citizens` rights, border arrangements 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. .