On January 23, 2013, British prime minister David Cameron first mentioned the brexit referendum.On January 4, 2015, British prime minister David Cameron said he would bring forward the planned referendum in 2017 if possible. on May 28, 2015, it was reported that the British government submitted and published the bill on "brexit referendum" to the house of Commons, including the statement on the referendum question, and promised to hold a vote before the end of 2017.On March 16, 2017, queen Elizabeth ii approved the brexit bill, authorizing British prime minister Theresa may to formally start the brexit process.

On June 26, 2018, the queen approved the brexit act, allowing the UK to leave the eu. on July 12, the UK released a white paper on brexit. on September 19, Theresa may published an article in the German media, saying that Britain and the European Union are close to reaching a "brexit" agreement. She hopes that the eu can show sincerity and determination like the UK and make concessions to avoid the situation of Britain leaving the eu without a deal. on November 25th the leaders of 27 eu countries, excluding Britain, unanimously approved a draft brexit agreement.on December 10th the European court of justice ruled that Britain could unilaterally reverse its decision to leave the eu.

On March 12, 2019, the British parliament voted again on the revised "brexit" agreement, but it still failed to pass.

On April 10, 2019, eu countries reached an agreement to postpone the date of "brexit" to October 31.

On April 12, 2019, former UK independence party leader farage announced the formation of brexit party.

Detailed info： https://docsbay.net/brexit