Summarized by Jennifer Rae for The Plain Truth, from reporting and analysis by Raheem Kassam, The National Pulse.
Earlier this month, Michel Barnier, the European Union’s former Brexit negotiator, said that Britain must accept freedom of movement to rejoin the bloc.

Rejoining the EU would require Britain to accept freedom of movement, according to former European Union Brexit negotiator Michel Barnier. He also warned that Britain could not select only the parts of the Single Market it preferred.
The National Pulse examines his comments alongside migration projections and proposals for closer UK-EU ties. Its analysis considers what renewed integration could mean for Britain’s borders, economy and sovereignty.
Rejoining the EU and the four freedoms
In an interview with LBC, Barnier emphasized the Single Market’s four freedoms. These cover the movement of goods, services, capital and people.
He described those freedoms as indivisible. Consequently, Britain could not expect full Single Market participation while rejecting free movement of people.
Barnier nevertheless welcomed closer cooperation between Britain and the EU. He highlighted defense and foreign policy as areas where both sides could work together.
However, cooperation in those areas differs from joining the EU or participating fully in its Single Market. The article discusses both possibilities, which involve different arrangements.
Read Barnier’s interview with LBC.
What the migration projections suggest
The National Pulse also presents three scenarios for additional net migration following renewed membership or Norway-style Single Market participation.
Under its low scenario, additional annual net migration reaches 19,000 by the fifth year.
The middle scenario puts that figure at 82,000 annually by year five. Over ten years, the projected cumulative increase reaches approximately 714,000.
Meanwhile, the high scenario estimates an additional 200,000 annually by the fifth year. Its ten-year cumulative estimate reaches roughly 1.76 million.
These figures describe the publication’s modeled scenarios, rather than confirmed future outcomes. They compare potential migration with a baseline in which Britain remains outside the EU.
Read The National Pulse’s migration analysis.
IPPR proposes a different argument for Europe
Separately, the Institute for Public Policy Research outlines a strategy for rebuilding the case for European integration.
Its report recommends connecting closer European ties with British goals on security, migration and sovereignty. It also calls for democratic consent through a referendum or a clear manifesto commitment.
Rather than simply repeating arguments from 2016, the report presents cooperation as a response to international uncertainty. Its argument emphasizes the ability of larger partnerships to withstand outside pressure.
Read IPPR’s report on the UK’s relationship with Europe.
Why sovereignty remains central to the debate
Ultimately, the article identifies competing views of national control. Supporters of closer integration argue that cooperation can increase Britain’s influence and resilience.
Opponents, however, question the consequences for borders, independent decisions and immigration policy.
Barnier’s comments bring those differences into focus. Any proposal for renewed membership or full Single Market participation would need to explain both its benefits and its obligations.
Read Raheem Kassam’s full report and analysis at The National Pulse.