Prices are continuing to rise at their fastest rate for 40 years with food costs, particularly for bread, cereal and meat, climbing.
UK inflation, the rate at which prices rise, edged up to 9.1% in the 12 months to May, from 9% in April, the Office for National Statistics (ONS) said.
Fuel and energy prices are the biggest drivers of inflation, but the ONS said food costs had pushed it up further.
Workers and unions are pushing for pay rises to cope with higher prices.
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