Rejoining the European Union's internal electricity market is "absolutely essential" if the UK wants to bring down household energy bills, according to industry voices cited by Euractiv, reigniting a debate that has simmered since Brexit severed Britain's formal ties to the bloc's energy trading arrangements. The call comes amid persistent pressure on British consumers, who continue to face some of the highest electricity prices in Europe despite falling wholesale gas costs across the continent. Since leaving the EU's single electricity market, the UK has relied on looser trading arrangements with European neighbours, which industry figures argue introduce friction, inefficiency and additional costs into cross-border power flows through interconnectors linking Britain to France, the Netherlands, Belgium and beyond. The argument for closer integration rests on a straightforward premise: electricity markets function best when they can trade freely across borders, matching surplus renewable generation in one country with demand in another at the moment it is needed. Before Brexit, the UK participated in day-ahead and intraday coupling mechanisms that allowed interconnector capacity to be allocated automatically and efficiently. Outside that system, trading has become more cumbersome, and analysts have long warned this adds an unnecessary premium to wholesale prices that ultimately filters through to consumer bills. The stakes are considerable for Britain's net zero ambitions as well as its cost-of-living pressures. The UK is pouring investment into offshore wind, solar and interconnector infrastructure, all of which depend on efficient cross-border trading to maximise returns and keep the electricity system balanced as intermittent renewables take up a larger share of the generation mix. Closer alignment with EU market rules could, in theory, smooth the integration of this growing renewable capacity and reduce the reliance on costly balancing mechanisms that currently add to National Grid's operating costs. Politically, however, rejoining the EU's electricity market is far from straightforward. Any move towards deeper integration would require negotiation with Brussels over regulatory alignment, potentially touching on sensitive questions of sovereignty that have dogged the broader post-Brexit relationship. The current Labour government has signalled openness to a closer relationship with the EU on energy and trade issues, though it has stopped short of committing to full market rejoin, wary of reopening wider Brexit tensions. For now, the renewed push from industry adds to a growing chorus, including from energy suppliers, grid operators and consumer groups, arguing that market fragmentation is an avoidable drag on affordability. With energy bills remaining a dominant political issue and the government under pressure to demonstrate progress on both costs and decarbonisation, the question of Britain's electricity market relationship with the EU looks set to remain firmly on the agenda in the months ahead.