UK GDP rose 0.1% month-on-month in May 2026, recovering from a 0.1% contraction in April, according to the Office for National Statistics' monthly estimate published on 16 July 2026. The figure landed in line with market expectations and brought rolling three-month growth to 0.7%, a slight deceleration from the 0.8% recorded in the three months to April.

The growth was driven almost entirely by services, which account for roughly 80% of UK GDP. Services output rose 0.3% in May, while production (which includes manufacturing) declined 0.5% and construction fell 0.8%. Scientific research and development was the single strongest contributor to monthly output, surging 5.1%. The divergence between a services-led expansion and goods-producing contraction is consistent with the structural profile of the UK economy, where R&D-intensive services have increasingly carried monthly growth prints.

Liz McKeorn, ONS director of economic statistics, oversaw the release. The full statistical bulletin is available on the ONS website (ONS). The figures arrived alongside a positive revision from the International Monetary Fund, which upgraded its 2026 UK growth forecast to 1%, a 0.2 percentage point increase from its April projection. Across 2025 as a whole, UK GDP was estimated to have grown 1.3% (BBC News).

The fiscal backdrop is less benign than the headline GDP number suggests. The Resolution Foundation estimated that more than half of the £23.6 billion in fiscal headroom Chancellor Rachel Reeves identified at the spring statement would be wiped out by the economic effects of the Iran war, as reported by The Guardian. That compression of budgetary space arrives at a politically sensitive juncture: Reeves is expected to depart the Treasury on or around 20 July 2026 as Andy Burnham prepares to assume the premiership. Shabana Mahmood is expected to replace Reeves as chancellor under the incoming Burnham government.

The handover raises immediate fiscal-strategy questions. The next chancellor will inherit an economy growing, but at a modest pace, with industrial and construction sectors contracting on the month and geopolitical shock having already eroded the majority of available headroom. Whether the incoming Treasury team adjusts spending plans, revises fiscal rules, or absorbs the tightening will shape market expectations through the autumn. The IMF upgrade to 1% annual growth provides some external validation, but that figure predates the full quantification of war-related fiscal costs and remains below the 1.3% outturn for 2025.

The compositional picture also warrants attention. A 0.1% headline built on a 0.3% services gain, with R&D delivering outsized monthly contribution, masks weakness in the production base. Construction's 0.8% decline is the sharpest sectoral drop in the May data and points to potential softness in infrastructure pipeline execution. If goods-producing sectors continue to contract while services carry the economy, productivity dispersion across sectors will widen, with implications for regional growth distribution and trade balance dynamics.

For fiscal planners and monetary policymakers, the May release offers a baseline of resilience but not momentum. Three-month growth of 0.7% annualises to roughly 2.8%, though the deceleration from April's 0.8% rolling figure and the monthly contraction in April itself suggest the underlying pace is softer than the rolling average implies. The Bank of England's Monetary Policy Committee will weigh services strength against goods weakness in assessing demand-driven inflationary pressure. Meanwhile, the Resolution Foundation's fiscal headroom estimate means that any further deterioration in growth or upward pressure on debt-servicing costs could push the next chancellor toward difficult spending decisions within months of taking office.