Prime Minister Boris Johnson wins the British general election. It is therefore likely that the Brexit deal will soon be adopted. If the British Parliament approves the agreement, the European Parliament can vote on it in January. In the withdrawal agreement with the EU, Northern Ireland is still in the UK, but it must comply with elements of the EU customs code. On 15 November 2018, the day after the agreement and the support of the British government were presented, several members of the government resigned, including Dominic Raab, Secretary of State for leaving the European Union.  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 legislation would be paused.   As of 1 January 2021, the United Kingdom will no longer be part of the internal market or customs union. Even if an agreement on future relations is reached by the end of the year, the EU`s relationship with the UK will change radically and will be very different from those of the UNITED Kingdom, which was a member of the single market. Take, for example, the customs and tax formalities that will then be necessary. Like the EU Member States, citizens and businesses in Germany and the EU as a whole must adapt to these consequences of the end of the transition period, whether or not an agreement is reached on the future partnership with the UK. EU leaders approve the postponement of the date of Brexit to 31 January 2020, or earlier, if the UK and European Parliament approve the withdrawal deal by then.
The transition period ends in accordance with the withdrawal agreement. Following the discussions, the EU said the withdrawal agreement was a legal obligation, adding that « neither the EU nor the UK can change, clarify, modify, interpret, disobey or implement it unilaterally. » If passed, the bill would be an « extremely serious violation » of the withdrawal agreement and international law. On 6 September 2020, the Financial Times reported that the UK government was considering drafting new laws to circumvent the protocol of the Northern Ireland Withdrawal Agreement.  The new law would give ministers the power to determine which state aid should be notified to the EU and to define which products at risk of being transferred from Northern Ireland to Ireland (the withdrawal agreement stipulates that in the absence of a reciprocal agreement, all products are considered vulnerable).  The government defended this approach and stated that the legislation was in accordance with protocol and that it had only « clarified » the volumity in the protocol.  Ursula von der Leyen warned Johnson not to violate international law and said that the implementation of the withdrawal agreement by Britain was a « precondition for any future partnership ».  On 8 September, the Minister of Foreign Affairs for Northern Ireland, Brandon Lewis, told the British Parliament that the government`s internal market bill would « violate international law ». »  The agreement was revised as part of the Johnson Department renegotiation in 2019.