Below is a non-exhaustive list of documents on the UK`s planned withdrawal from the EU, documents relating to the UK and its position in the EU, and a list of useful links on the subject. If you would like to suggest a document (included in EUR-Lex) or a link to be added to this list in order to get easy access, let us know. . Official Journal of the European Union, L 029, 31 January 2020: On 23 June 2016, the United Kingdom held a referendum on the UK`s continued membership of the European Union (including Brexit). On 29 March 2017, the UK informed the European Council of its intention to leave the EU, formally triggering Article 50 of the Treaty on european Union.