evidence: Although Northern Ireland is currently suffering the full impact of Brexit as part of the United Kingdom, 55.8% of the population of Northern Ireland voted in favour of remaining in the European Union. The principle of the consent of the people of Northern Ireland to the choice of their constitutional future is considered to be one of the essential foundations of the Good Friday Agreement[15]. [...] After numerous obstacles and surprising turns of events, it was decided, as a provisional solution of last resort (backstop) in a first agreement, that the United Kingdom as a whole, and not just the province of Northern Ireland as had initially been envisaged, would remain in a customs union with the European Union and that Northern Ireland would remain in partial alignment with the Single Market. But this first agreement met with hostility from the most ardent Brexiters of the British Conservative Party allied with the Unionists of the DUP, who found the option unacceptable and undemocratic and feared that it would imprison the United Kingdom indefinitely in the European Customs Union. Despite three attempts, Theresa May failed to win parliamentary support and was forced to resign in July 2019. [...] [18] The Unionists felt betrayed by Boris Johnson in December 2019 when he decreed that there would be a frontstop in the Irish Sea after promising never to inflict differential treatment on the province. Some may have regretted having torpedoed the Agreement reached by Theresa May, which was much more favourable to them.