Britain's gross domestic product rose by 0.6 per cent in the first three months of the year after a 0.7 per cent expansion in the previous quarter.
That took the annual growth rate to 2.8 per cent, the slowest since the fourth quarter of 2003.
Industrial production fell by 0.1 per cent again, thanks partly to a sharp fall in electricity output as temperatures were warmer than usual at the start of the year.
Agricultural output also fell sharply as did mining and quarrying.
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Overall growth was driven by the service sector, but even this slowed, expanding by 0.8 per cent, its weakest in nearly two years. Within this, however, government and other services accelerated.