The Office for National Statistics has unveiled a revised methodology revealing that Britain's productivity performance since the global financial crisis has been far stronger than previously estimated, with statisticians discovering that hours worked had been significantly overstated in earlier calculations.
According to the newly adopted framework from the ONS, annual output per hour grew at an average rate of 1.3% in the decade leading up to 2019—nearly double the previous estimate of 0.7% and much closer to the 2% pace recorded in the decade preceding the 2008 financial crisis.
This latest report adds to growing evidence that the UK economy has demonstrated greater resilience than expected, following several months of surprisingly robust economic expansion. The findings come as a welcome boost for Chancellor John Healey, who is preparing to address challenging fiscal conditions in next month's Budget and needs to close an ever-widening gap in public finances.
The revision marks yet another adjustment to data collection and statistical methods by the ONS, which has faced increasing scrutiny in recent years over flaws in its labour market, price, and gross domestic product (GDP) figures. These recurring issues ultimately triggered an official investigation and the sudden departure of National Statistician Ian Diamond last year on health grounds. His successor was only appointed last week, more than a year after Diamond's exit.
The ONS has adopted a new "component method" for productivity statistics, which explicitly accounts for annual leave, public holidays, sick leave, and other shifts in working patterns to produce lower estimates of total hours worked. This approach draws on household and business surveys alongside administrative data.
The revised calculations show that output per hour in 2024 stands 40.7% higher than in 1997—more than 6 percentage points above the previous estimate. This report partially rewrites the narrative around Britain's post-financial-crisis productivity performance, which had previously suggested the UK suffered a more severe slowdown than many other advanced economies.
The ONS confirmed it has consulted with all stakeholders, including the Treasury, regarding the new methodology. The component approach will become the official productivity measure starting in November. The statistical body noted that improvements in actual hours worked account for half of the productivity slowdown observed since 2008, adding that the so-called "productivity puzzle" persists under both methodologies, though it appears smaller within the component framework.
The refined approach also reveals that during the pandemic—when the furlough scheme primarily applied to low-productivity sectors—those who remained in work demonstrated productivity levels close to pre-2008 trends. The ONS clarified that these revisions do not affect current GDP figures. Later this year, following the release of its annual GDP dataset, the agency will publish productivity estimates through the second quarter of 2026, after which the new methodology will be integrated into its headline productivity statistics.
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