A new survey published by British Future has found that almost half of respondents in the United Kingdom — 46% — would now vote to rejoin the European Union, against 29% who would vote to stay out. The finding signals a shift in public sentiment since the 2016 EU referendum, when immigration stood at the centre of the campaign and strongly shaped the Leave vote.

The research revisits the divide that defined the referendum. Immigration was a key issue in 2016, and it influenced the Leave vote in two distinct ways, the survey's framing makes clear. Some voters wanted to reduce immigration itself. Others were driven less by numbers and more by principles of control and what they called 'sovereignty' — the belief that decisions about who enters the country should rest with the UK rather than with EU institutions.

Those motivations matter now because the debate over free movement is returning. The headline result — 46% for rejoining versus 29% against — suggests a public that has moved measurably since 2016. The remaining share of respondents, just over a quarter, did not back either position in the survey as reported, leaving a substantial bloc whose views could decide any future vote.

For migration policy watchers, the survey touches the core question that has shadowed UK immigration politics for a decade: whether free movement is judged by its costs or by its benefits. The survey's own framing points to the conditions under which the public appears willing to reconsider it — where it brings benefits to trade and creates opportunities for UK citizens.

That framing mirrors the real-world trade-off at the heart of any future UK–EU negotiation on mobility. Free movement was one of the four EU freedoms the UK gave up when it left the bloc, and rejoining it — or negotiating any softer youth mobility or work-travel arrangement — would require the UK to accept a degree of reciprocal movement in exchange for market access.

The numbers published by British Future give a snapshot rather than a forecast. A 46–29 split in favour of rejoining represents a clear reversal of the 2016 result, when 51.9% of voters chose to leave. Yet the survey also shows the Leave coalition's original motivations have not disappeared: the impulse to reduce immigration and the desire for sovereign control of borders both remain part of the picture the research documents.

For now, the United Kingdom's immigration rules are unchanged by this survey. It measures opinion; it does not alter policy. Readers tracking UK immigration should continue to anchor any personal decisions to official sources — the Home Office and GOV.UK publish the rules currently in force, and any change to free movement or EU mobility arrangements would come through formal government action, not polling.

What the British Future research does establish is that the politics of immigration that decided the 2016 referendum have not settled. Nearly a decade on, a plurality of those surveyed says it would vote to rejoin the EU, and the survey links that willingness to tangible gains: stronger trade and opportunities for UK citizens abroad.