The UK's post-Brexit regulatory divergence from the EU is not an abstraction. The IPPR has attempted to isolate the specific cost of lacking a mutual recognition agreement for product testing, estimating that UK exporters have lost between £3.7bn and £6.5bn annually since the Trade and Cooperation Agreement took effect in 2021. The thinktank says it controlled for Covid disruption, global supply chain shifts, Russia sanctions, energy shocks, and re-export patterns — and the MRA gap remained statistically significant throughout. The losses concentrate in three sectors: motor vehicles and parts (£2.48bn–£3.42bn), electronics (£1.17bn–£1.67bn), and pharmaceuticals (£740m–£820m). These are industries where product certification is expensive, testing regimes are rigorous, and duplicating the process for two regulatory jurisdictions tips the cost-benefit calculation against exporting. Many companies have simply stopped selling to the EU or relocated operations inside the bloc. The scale is clarifying when set against the government's own benchmarks. The estimated annual loss is roughly 0.18% of national income — about three times what the UK expects to gain from the CPTPP trade deal with Japan, Canada, Australia, and Singapore. The government has been loudly celebrating CPTPP while quietly absorbing a self-inflicted cost triple its size on the EU side. The political terrain is shifting but not fast enough. The Starmer administration earlier this year pitched a single market for goods to Brussels but was rebuffed; EU officials insisted on no cherrypicking. The IPPR's proposed solution — dynamic alignment, where the UK keeps product rules in step with the EU to enable mutual recognition — is the path of least resistance, but it requires accepting EU regulatory authority in relevant areas. At the Lib Dem conference, Ed Davey went further, proposing talks to rejoin the single market and customs union outright. The core tension is sovereignty versus efficiency. Dynamic alignment means ceding autonomous rule-making in exchange for frictionless market access. The IPPR frames this as a trade-off worth making; opponents frame it as regulatory vassalage. Neither framing is wrong — the question is which cost the UK is willing to bear. What makes this report notable is its methodological ambition. Previous estimates of Brexit trade losses have been broad and contested. By isolating the MRA variable specifically and testing it against alternative explanations, the IPPR claims to have identified a discrete, fixable policy lever rather than a diffuse, irreversible structural shift. If the methodology holds, this is not a lament about Brexit — it is a costed proposal for a specific negotiation. The obstacle is not technical but political. The EU has signalled willingness for deeper cooperation but only within its framework. The UK government has signalled interest but keeps bumping into the sovereignty constraint that made Brexit popular in the first place. The £6.5bn figure is a measure of the gap between what the UK chose and what it costs.
