Food stores sales volumes fell by 0.5 percent in May, with retailers indicating “that increased cost-of-living and food prices continued to affect sales volumes,” the ONS added.
Shops were impacted also by “some anecdotal evidence of increased spending on takeaways and fast food” owing to an extra public holiday last month for the coronation of King Charles III.
Overall sales climbed thanks to cheaper fuel and demand for summer clothing and outdoor goods, the ONS noted.
Annual food price inflation was close to a record-high of 18.4 percent in May, official UK data showed this week.
Overall inflation stood at 8.7 percent, unchanged from April, causing the Bank of England (BoE) on Thursday to hike its key interest rate by a larger-than-expected amount.
The half-point lift to a 15-year peak of five percent was the 13th increase in a row.
Millions of Britons who have home loans are particularly affected as commercial lenders pass on the BoE rate hike.
Finance minister Jeremy Hunt was Friday meeting with major UK mortgage lenders to discuss possible support measures for struggling customers, including those in arrears.
On food, Prime Minister Rishi Sunak Thursday acknowledged that households’ weekly shopping bills had “gone up far too much in the past few months.”
“We’re looking at the supermarkets, making sure that they’re behaving responsibly and fairly when it comes to pricing all those products, to make sure that we're easing the burdens,” he added.