Brexit: Detailed notes on the UK's Departure from the European Union

The Vote: On June 23, 2016, the United Kingdom (UK) voted to leave the European Union (EU) by a very small margin.
Immediate Impact: * The result caused international shock and widespread concern. * The decision carried major implications for the UK and the EU across political, economic, and social levels.

Post-War Skepticism: * In $1950$ , only $10\%$ of British exports went to the six countries that formed the European Coal and Steel Community (ECSC). * The UK was historically more interested in maintaining relations with its former colonies and the Commonwealth. * In $1960$ , the UK helped form the European Free Trade Association (EFTA) as an alternative to the EEC.
Core Concerns: * The UK was considered one of the most eurosceptic members. * There was a lack of conviction regarding the concept of a "United States of Europe." * Key points of friction included the EU budget, regulation from Brussels, immigration, and national sovereignty. * The UK maintained an "island mentality" and a former colonial superpower perspective.
Timeline to Entry: * The UK re-evaluated its position as the EEC became successful. * Applications in $1961$ and $1967$ were rejected (notably by France in $1963$ ). * The UK eventually joined in $1973$ . * A referendum on membership was held in $1975$ , where $67\%$ of the population voted to "Remain."

Economic Integration: Over the decades, the UK economy became deeply intertwined with the EU via trade, services, investment, and the movement of EU nationals. Trade with EU partners grew to exceed $50\%$ of the UK’s total trade.
Policy Divergence: Despite integration, the UK remained outside critical areas of the EU project: * It did not participate in the Eurozone. * It opted out of the Schengen free movement area. * It demanded the right to choose which Justice and Home Affairs policies to join.

David Cameron’s Promise: In January $2013$ , Prime Minister David Cameron promised a renegotiation of membership followed by an "In/Out" referendum if the Conservatives were re-elected in $2015$ . This was largely an effort to satisfy eurosceptic backbenchers.
Renegotiation: Following his $2015$ victory, Cameron entered talks with the EU. This period coincided with the Eurozone crisis and the global refugee crisis.
Campaigning: The referendum was set for June 23, 2016, leading to fierce campaigning characterized by populism, nationalism, and misinformation.

Core Arguments: * The UK’s role in the European peace project (foundation of peace for $60$ years). * The tangible political, economic, and commercial gains of membership. * The risks of being isolated in a globalized era. * Labeling Brexit as driven by negative ideologies: nationalism, populism, racism, and xenophobia.
Demographics: Targeted younger voters; $73\%$ of younger people (according to YouGov) expressed a desire to stay in the EU.

Core Messages: * "Taking back control" of borders, decision-making, and global partnerships. * Restoring the "British way of life" through populist rhetoric. * Inciting fear regarding immigration from within the EU and the global refugee crisis.
Specific Claims and Visuals: * The "Breaking Point" poster depicting a queue of migrants. * The claim that the UK sends $\pounds 350$ million a week to the EU, which could instead fund the NHS. * Warnings that Turkey (population $76$ million) was on the verge of joining the EU. * Newspaper headlines alleging "Migrant Invasions" and immigrant-driven crime.

Numerical Results: * Turnout: $72.21\%$ * Leave: $51.89\%$ ( $17,410,742$ votes) * Remain: $48.11\%$ ( $16,141,241$ votes)
Demographic Splits: * 18-34 Age Group: Approximately $60\%$ Remain. * 55+ Age Group: Approximately $60\%$ Leave.
Political Consequences: * P.M. David Cameron resigned immediately. * Prominent leave figures like Nigel Farage and Boris Johnson stepped into the spotlight. * Theresa May became the new Prime Minister, tasked with the "Hard" vs. "Soft" Brexit debate.

Societal Split: The UK became polarized between "Remainers" (bitter about losing links to Europe), "Leavers" (declaring independence), and "In-betweens" (those with "buyer's regret" who used the vote as a protest).
Regional Tensions: Scotland (which voted overwhelmingly to Remain) and Northern Ireland (worried about the border) expressed deep resentment.
Process: Article 50 was triggered on March 29, 2017, initiating a two-year countdown for departure.

Trade: Whether the UK would stay in the Customs Union or a loose Free Trade Area.
Citizens' Rights: The status of EU citizens in the UK and UK citizens in the EU.
Financials: The "divorce bill" or UK payments to the EU.
The Irish Border: The total open border between the Republic of Ireland and Northern Ireland required controls but threatened the Good Friday Agreement of $1998$ . The "Backstop" was discussed but remained a point of contention.
London: Maintaining the City of London as a major EU financial hub.

Deadlock: For over three years, negotiations stalled. Various deals were rejected by the British Parliament.
Leadership Change: Theresa May stepped down in June $2019$ and was replaced by Boris Johnson, who vowed to "Get Brexit Done."
Tactics: Boris Johnson briefly shut down (prorogued) Parliament in August $2019$ to limit debate.
Completion: A Withdrawal Agreement was ratified in January $2020$ . The UK officially left the EU at $23:00$ on January 31, 2020, entering a transition period.

Signing: A deal was finally signed on Christmas Eve $2020$ .
What was Lost (Changes from EU Membership): * Free Movement: Removal of pet passports, loss of the right to work/stay/live freely, and potential roaming charges. * Trade in Goods: Introduction of customs formalities, SPS checks, and rules of origin procedures (no longer frictionless). * Trade in Services: Loss of the financial services passport and easy recognition of professional qualifications. * Transport/Energy: Departure from the single aviation area, single internal transport market, and the single internal energy market. * Programs: Loss of access to Erasmus, NextGenerationEU, and Galileo encrypted signals (though Horizon Europe access remained possible under specific conditions).