Could Britain really rejoin the EU?

Ten years after Brexit, the UK’s relationship with the EU is back in focus—not as a political afterthought, but as a central strategic question. Once dismissed as a fringe idea, rejoining the EU is now a serious talking point within the Labour Party, driven by economic stagnation, a fractured political landscape, and a growing recognition that the UK’s post-Brexit 'independence' has delivered little tangible gain. The debate has been reignited by figures like Wes Streeting, who called Brexit a 'catastrophic mistake,' and Andy Burnham, who has tempered his earlier enthusiasm amid electoral pressure. Yet behind the rhetoric lies a deeper reality: the UK’s attempts to build new trade relationships with the US, Australia, and the Gulf have yielded negligible economic returns, while its security and defence ambitions are hamstrung by its exclusion from key EU initiatives like the SAFE defence fund. Experts argue that the UK’s current 'halfway house' options—customs unions, single market access—offer neither full market access nor true regulatory independence. Instead, full EU membership may be the only way to achieve meaningful integration on defence, economic growth, and geopolitical alignment in an era of US retrenchment and Chinese competition. Legal analysis suggests the UK could avoid joining the euro or Schengen through treaty-based opt-outs, but political will and EU acceptance remain the real barriers.