EU's Transformation Shapes UK's Rejoin Debate

The future of the United Kingdom's relationship with the European Union has re-emerged as a central topic, driven by the impending conclusion of Keir Starmer's premiership and the likely succession of Andy Burnham. The debate gained further momentum when Wes Streeting, a former Health Secretary and potential future Chancellor of the Exchequer, recently described Brexit as a "catastrophic mistake" and advocated for Britain to rejoin the EU. However, Mujtaba Rahman, Managing Director for Europe at political risk research and consulting firm Eurasia Group, emphasizes that the EU the UK departed from no longer exists in its previous form.

The "rejoin" debate in the UK has largely focused narrowly on the economic costs imposed by Brexit and the feasibility of regaining former opt-outs from the Euro and Schengen areas. Rahman argues that this discussion fails to account for the profound changes the EU has undergone in recent years. While Andy Burnham, the anticipated next Prime Minister, has previously expressed a long-term desire for the UK to rejoin the EU, he has more recently distanced himself from making it an immediate policy objective, signaling a focus on domestic priorities, particularly during the Makerfield by-election campaign where his constituency strongly voted to leave.

By 2026, the EU has evolved into an organization increasingly built on common borrowing, an assertive joint industrial policy, and an expanding role in security and defense. Confronted by crises such as the Covid-19 pandemic, the Union responded with substantial joint debt mechanisms, including €100 billion for furlough schemes and €750 billion for recovery efforts. Looking ahead, the EU aims to establish a permanent fiscal capacity within its 2028-2034 budget, enabling it to borrow from capital markets as needed. Furthermore, there are ongoing pushes for supranational taxation, such as EU-wide corporate and digital taxes, to help service its growing debt burden. Institutionally, there's a discernible shift away from national vetoes towards majority voting in critical areas like foreign policy and sanctions.

This transformation has led to a more assertive and combative EU stance towards both the United States and China, diverging significantly from the UK's historical preference for close economic, security, and strategic ties with Washington and a pragmatic approach to economic engagement with China. The bloc's increasing pursuit of technological sovereignty also marks a departure from traditional British instincts. The economic repercussions of Brexit on the UK are now clearly evident a decade later. Estimates suggest that by 2025, the UK's Gross Domestic Product (GDP) had been reduced by 6% to 8%, with business investment approximately 18% lower, and both labor productivity and employment around 4% lower than they would have been without Brexit. Trade frictions and regulatory uncertainties have notably dampened business investment and trade volumes.

The UK preparing for its seventh Prime Minister in a decade underscores a period of significant political instability. The internal Labour Party debate regarding Europe, coupled with the British economy's structural vulnerabilities exposed by global bond market volatility, further complicates this landscape. While opinion polls indicate a steady majority, particularly among younger voters, favoring rejoining the EU, the path forward for political leaders navigating this changed environment remains uncertain.

Analysts and market observers suggest that any serious consideration of the UK's future relationship with the EU must acknowledge the Union's current reality as a more integrated, interventionist, and geopolitical actor. For a prospective Prime Minister like Burnham, balancing ambitious European cooperation goals with an already stretched defense budget will be a key challenge. The upcoming UK-EU summit on July 22 is expected to provide crucial insights into the new leadership's approach to this complex and evolving relationship.