The <a href="https://en.wikipedia.org/wiki/United_Kingdom" id="mwAX4" rel="mw:WikiLink" title="United Kingdom">United Kingdom</a>'s membership within the <a href="https://en.wikipedia.org/wiki/European_Union" id="mwAX8" rel="mw:WikiLink" title="European Union">European Union</a> ceases in accordance with <a href="https://en.wikipedia.org/wiki/Withdrawal_from_the_European_Union#Procedure" id="mwAYA" rel="mw:WikiLink" title="Withdrawal from the European Union">Article 50</a>, after 47 years of being a member state.<sup about="#mwt108" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-20"}}' id="cite_ref-20" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_31#cite_note-20" id="mwAYE" style="counter-reset: mw-Ref 20;"><span class="mw-reflink-text" id="mwAYI">[20]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-20"><cite about="#mwt105" class="citation news cs1" id="mwB2g"><a class="external text" href="https://www.bbc.co.uk/news/uk-politics-50205603" id="mwB2k" rel="mw:ExtLink nofollow">"Brexit: Johnson agrees to Brexit extension - but urges election"</a>. <i id="mwB2o">BBC</i>. 28 October 2019.</cite><span about="#mwt105" class="Z3988" id="mwB2s" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=BBC&amp;rft.atitle=Brexit%3A+Johnson+agrees+to+Brexit+extension+-+but+urges+election&amp;rft.date=2019-10-28&amp;rft_id=https%3A%2F%2Fwww.bbc.co.uk%2Fnews%2Fuk-politics-50205603&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+31"></span></span>