The United Kingdom’s incoming prime minister has pledged to transfer authority from Westminster to local and regional governments, aiming to empower those best positioned to drive economic growth and foster a renewed sense of agency and optimism. Andy Burnham, set to lead the government, has garnered support across his Labour Party and from economists across the political spectrum who argue that the country’s centralized economic management has hindered growth.

Devolution, which involves granting regional governments greater control over policies and finances, is seen by many as a mechanism to stimulate local economies by aligning decision-making more closely with regional needs. Advocates also suggest that allowing local governments to borrow against anticipated tax revenues and hold politicians more accountable could enhance growth incentives.

However, a recent report from researchers at Harvard University and King’s College London offers a sobering assessment of Labour’s approach since taking office in 2024. Despite promises of "landmark devolution" aimed at reducing regional disparities, the report warns that the government risks missing a critical opportunity to address the UK's longstanding regional inequalities.

While a consensus has emerged supporting increased devolution within England, fundamental challenges persist. Notably, despite considerable devolution to Scotland, Wales, and Northern Ireland since 1997, these regions have not experienced significant economic growth improvements, raising questions about the efficacy of such measures.

A major obstacle lies in fiscal arrangements. Key sources of public revenue such as income tax and corporation tax—which fund approximately 43% of UK public spending excluding national defense and debt servicing—are concentrated disproportionately in London. Under full fiscal devolution, where regions retain locally raised revenues, London could reduce its tax rates by half, whereas other regions might face substantial tax increases to cover their expenditures. This imbalance makes comprehensive fiscal devolution politically unfeasible due to perceptions of unfairness.

Consequently, regional governments often compete for larger shares of London’s tax revenues distributed by central government. This process is politically fraught and places the responsibility on Whitehall to mediate contentious debates about what constitutes an equitable distribution of resources.

For example, northern cities such as Manchester, Birmingham, and Liverpool have criticized the significant investments in London’s Elizabeth Line, despite the capital bearing 70% of the project’s costs. Conversely, Londoners point to longer average commuting times and greater infrastructure demands as justification for continued investment in the capital. Both perspectives highlight the complex challenges in balancing regional needs.

Some proposals suggest allowing regions to retain additional revenues generated beyond a baseline allocation, but such partial fiscal devolution tends to dilute growth incentives. Further complications arise when periodic reassessments of regional funding needs are introduced, as political pressures aim to prevent widening disparities, potentially undermining the accountability and ambition that devolution seeks to promote.

While devolution remains a popular and rhetorically appealing strategy to address regional economic disparities, experts warn that its implementation involves difficult trade-offs. Expectations that a simple redistribution of power will transform growth prospects or resolve longstanding regional grievances are likely to be overly optimistic.