At a recent economic conference in Barcelona, questions about the possibility of the United Kingdom rejoining the European Union have resurfaced among business leaders and policymakers. Martin Wolf, a prominent economic commentator, responded to these inquiries by reaffirming his position that a full reversal of Brexit is both unrealistic and unnecessary in the foreseeable future.

Wolf argued that Brexit, despite being a strategic error, cannot simply be undone. He cited the ancient philosopher Heraclitus’s assertion that “you cannot step into the same river twice” to underline how the circumstances surrounding the UK and EU have fundamentally changed since the 2016 referendum. Attempting to rejoin would not only involve complex and protracted negotiations but also risk deepening political divisions within the UK and consuming significant political capital on both the British and European sides. Furthermore, the conditions of EU membership have evolved, making any future accession process different from the terms under which the UK originally exited.

Reflecting on Brexit’s consequences, Wolf noted that the UK has not seen the promised economic dynamism or political unity following its departure from the EU. Instead, the country remains economically weaker, more politically fractured, and has not achieved a significant reduction in immigration. The global context that initially shaped the “global Britain” vision has shifted as well—geopolitical tensions, retreating globalization, and an unstable US alliance have reinforced the EU’s role as the UK’s primary economic and strategic partner. In 2025, nearly half of UK goods trade was still with EU member states.

Despite the unlikelihood of a traditional re-entry, Wolf highlighted an alternative approach, often referred to as the “Swiss option,” involving a constellation of bilateral agreements that would allow the UK to engage closely with the EU’s single market, security arrangements, scientific collaborations, and regulatory frameworks. While this approach might result in the UK being a rule-taker rather than a full member, the autonomy gains touted during the Brexit campaign have, according to Wolf, largely failed to materialize.

One significant obstacle to deeper integration remains the issue of free movement of labor—a key EU principle that was a major point of contention in the Brexit debate. However, Wolf suggested that current demographic pressures in the UK make continued migration necessary. Additionally, the historic reasons for substantial EU migration, such as post-enlargement labor flows from Eastern Europe and Eurozone crises, have diminished, and the UK has largely seen EU migrants integrate successfully. Future EU enlargement is expected to be limited, potentially easing concerns over this issue.

Wolf concluded that while a complete Brexit reversal is improbable and potentially damaging in the short to medium term, the UK should pursue closer ties with the EU incrementally. This pragmatic distancing from the current status quo would strengthen the UK's economic and strategic partnership with Europe, allowing for more stable and mutually beneficial relations. He also cast doubt on the prospect of the UK’s relationship with the United States returning to previous levels of closeness following recent political developments, implying that Europe remains Britain’s most important partner in the foreseeable future.