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On 23rd January 2013, Prime Minister David Cameron made a speech that set out his vision for a renewed partnership between Britain and the European Union. Apart from a call for repatriating certain powers, the Prime Minister promised the British people an in-or-out referendum in 2017 should his party win the 2015 general election. Now, after the Conservative Party’s surprisingly won an absolute majority in the May ballot, Mr Cameron decided to fast track the referendum, to be held as soon as 23rd June 2016.

The referendum process raised many important questions for the United Kingdom. Will David Cameron be able to negotiate a “New Deal” for his country before June 2016? How will his diplomacy affect Britain’s relationship with its European partners? Is a referendum of this kind democratic? And, what would a British exit from the EU—a “Brexit”—look like? Over the past year, the Oxford University Politics Blog has published a number of expert contributions that engage with these issues.

Now that the UK has voted to leave, the series will focus on the consequences of Brexit, the exit negotiations, and the changing relationship between Britain and the EU.

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As we enter a key Brexit endgame week, a few thoughts – informed by game theory – come to mind on the ironies of the British negotiation position and strategy thus far. The basic claim of bargaining theory is that you need a strong ‘reversion point,’ that you can go back to if bargaining fails. Once Article 50 was activated, that was necessarily ‘No Deal’ for the UK. But No Deal is likely self-damaging and certainly divisive. So, it did not and cannot represent a credible reversion point. Without this clear reversion point, one option is to pretend you want something self-damaging – the ‘madman’ approach. For this tactic to work, though, you need to be believed to be ‘mad’ …

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According to social media in Russia, “Brexit” has just assumed a new meaning: you say goodbye, but never leave. Vasilij Petrovich has drunk half a bottle of vodka, broken some precious porcelain, offended the hosts, and despite saying goodbye, he is still sitting at the table and drinking. You feel like pushing him out to the cold, but this would create more problems than keeping him in. This story reflects the current European dilemma. For many years, the United Kingdom enjoyed the benefits of European integration without trying to become a constructive, let alone affectionate, EU member. Two years ago, it decided to leave the EU, but is still pondering whether to leave through the door, window or chimney. The …

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On January 15, 2019, Prime Minister Theresa May’s Brexit deal suffered a defeat of historic proportion in the House of Commons: 432 MPs voted against and 202 for the ‘EU Withdrawal Act’, with a staggering margin of 230 votes. But how do the MP positions on May’s deal compare with the constituency-level votes on the 2016 referendum? [i] Notably, almost all the intra-party variation in voting takes place on the Tories’ side of the aisle. Only 3 Labour MPs bucked the party line and voted for the deal, whereas 118 Tories voted against May’s proposal. The plot below shows the distribution of constituency vote on the Brexit referendum by MPs voting either for or against the Brexit deal. The graph …

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On June 23rd, 2016, the citizens of the UK voted to leave the European Union. This began an unprecedented process of dissociation, commonly known as Brexit. Among the many challenges that Brexit poses is how to handle the border between Britain and the Republic of Ireland. In the recent past, the “soft” border between the two nations has allowed for the free flow of people and goods. However, if Brexit negotiations fail, a “hard” border will replace the currently soft border between the Republic and Northern Ireland. This presents a problem because under present conditions the border allows for mutually beneficial economic and social exchange, as well as having been instrumental in guaranteeing the Northern Irish peace process. This border …

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Brexit, if it has to happen, could have a silver lining. It could be an opportunity to reform and refashion the European project by making good on the aspiration of an ever-closer political union, needed today more than ever before. The Need for a Stronger Union President Macron addressing the need for EU reform with deeper political integration 26 September 2017 at the Sorbonne in Paris. Photograph: Ludovic Marin/Reuters Judging from my experience in the UN climate change negotiations, the EU can be a major international player and a force for good, but only if it ceases to ‘punch below its weight’ due to a lack of political union. This is why I fully concur with the view expressed by …

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When Teresa May announced her snap election last April, she not only ruined my Roman holiday, but also made me cringe about having written a blog in the immediate aftermath of the Brexit referendum in which I had encouraged just that, namely: “Go with Dignity – Call a Snap Election!” Why? By then I had accepted the prevailing wisdom that the Conservatives would win a landslide victory, providing them with a three-figure majority in the Commons. This would have given her the popular mandate to push through Brexit in the ‘hardest’ possible form, thus nullifying any chance for a second ‘in-out’ referendum on the outcome of the Article 50 negotiations, which I had by then advocated in “The Will of …