UK Targets EU Trade Reset to Recover Half of Economic Output Lost to Brexit

Rolling back Brexit would likely boost the UK economy, but the size of the gain depends on how far the government goes in rebuilding ties with the European Union. Bloomberg Economics says leaving the bloc has already cost the UK about 2% to 4% of forgone economic output, and that almost half of that lost output could be recovered through better trade with Europe.

That economic backdrop helps explain why Keir Starmer’s Labour government is pursuing a reset with Brussels rather than a full return to the pre-Brexit status quo. According to the European Parliament’s think tank, the UK has made clear it will not rejoin the single market or customs union, but it has begun engaging diplomatically with the EU as a priority, with both sides looking at closer cooperation on security, defence, trade, research and innovation.

The Bloomberg Economics analysis suggests that the most meaningful gains would come from reducing trade barriers, especially for goods and regulated sectors. It also implies that a large share of the Brexit hit has come not from one dramatic break, but from the accumulated friction of extra checks, paperwork and regulatory divergence that make cross-Channel commerce slower and more expensive.

The political limits are just as important as the economic ones. Even if the UK wants closer alignment, the EU is unlikely to offer the same terms Britain had as a member, and some issues remain highly sensitive, including mobility, fisheries and the broader question of how much UK law should track EU rules. The European Parliament report notes that the EU is particularly interested in improving mobility, including youth mobility, and preserving access in areas such as fisheries, while the UK government has drawn red lines around returning to the single market and customs union.

For businesses, the stakes are practical as well as symbolic. A closer relationship with the EU could ease trade for exporters, manufacturers and sectors that depend on regulatory alignment, while a limited reset would likely deliver only a partial recovery. Bloomberg Economics argues that the choice now facing the government is not simply whether to “undo” Brexit, but which parts of the economic damage it can realistically reverse through targeted agreements.

The wider context is that relations between London and Brussels have improved since the most contentious years after withdrawal, particularly after the Windsor Framework helped settle some Northern Ireland disputes. The European Parliament’s think tank says cooperation has expanded in areas such as defence, climate and energy policy, and it expects negotiations to intensify as both sides weigh what a post-Brexit partnership should look like in practice.