The biggest UK supermarket food price rises revealed
UK households need to be prepared for supermarket price rises, a leading consumer group has warned, as it emerged prices of food products have risen the most.
Supermarket inflation rose for the first time in more than a year in June, according to research by consumer champion website Which? He found it. There was an increase from 2.4 percent in May to 2.6 percent last month; Increasing pressure on supply chains due to the US war in Iran is thought to be a major factor.
New data reveals Britons are paying 11.1 per cent more for fish than in June last year, making it the fastest-growing food product in price.
This was followed by energy drinks with an increase of 5.5 percent, chocolate with 3.8 percent, water with 3.6 percent and fresh fruit with 3.4 percent; all of these increased at rates that reduced inflation.
To obtain their findings, the researchers tracked the prices of more than 27,000 items throughout the year.
The rise in fish prices reflects rising costs reported by fish and chip shop owners this year; Many of them warned that rising prices for cod and haddock were forcing them to make customers pay more.
Reena Sewraz, Which One? The retail expert said: “This month’s rise in grocery inflation, after months of declines, is a reminder that the pressure on household budgets has not gone away.
“While overall inflation remains well below the high levels seen during the cost of living crisis, our latest data, combined with retailers’ own warnings that cost pressures remain across the system, shows that supermarkets cannot remain complacent and it is vital that affordable budget ranges are widely available in all stores so shoppers do not have to pay more for everyday essentials.”
Looking at the biggest price increases for individual products, researchers found that a 10-pack of Asda’s own-brand cheddar slices rose from 65p in the three months to June 2025 to £1.39 in the same period this year; 113 percent increase.
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This was followed by a 750ml bottle of Shloer Zero White Grape at the retailer, rising 95 per cent from £1.42 to £2.77. The list also included Sainsbury’s own-brand pork pies, up 92 per cent, a 40g packet of Kettle crisps at Morrisons, up 70 per cent, and a 350g bag of breaded haddock fillets at Tesco, up 54 per cent.
Inflation remained stable at 2.8 percent in May, after rising to 3.3 percent in March due to increased fuel costs due to the US-Iran war that started in February.
Despite progress in peace talks last month, conflict between the two countries has resumed in the Middle East, with the vital Strait of Hormuz shipping waterway becoming a bargaining chip.
Approximately 20 percent of the world’s gas and oil passes through this key trade route, and effectively closing it would raise oil prices and impact fuel, energy and food costs worldwide.
Late last month, Sainsbury’s chief executive Simon Roberts said grocery inflation had so far remained lower than feared but warned there remained “pressure on the system”.
He told stakeholders that “consumer sentiment is not strong, there is a great deal of uncertainty about how things will shape up for them, and there is still a lot of uncertainty about exactly how the impact of the conflict in the Middle East will impact the economy and consumers.”
“We certainly think that from mid-summer onwards we will start to see some of the pressure from fresh food supply chains,” he said as he presented the supermarket chain’s trading update.
Mr Roberts added: “I think [it’s] Obviously, as we all know, a large component of the cost of food is the cost of energy. “As energy costs are under more pressure, inflationary pressures in the system arise from this.”
A Tesco spokesman said: “We are committed to keeping the cost of the weekly shop as low as possible. We do not recognize these figures and Which? has not shared its calculations with us. Customers can be confident of the great value they will find at Tesco each week.”
A Sainsbury’s spokesperson said: “The three products highlighted are not representative of a typical weekly shop; we offer our customers great value across their entire basket when they shop with us. Over the past five years, we have invested more than £1bn in keeping prices low rather than passing the full impact of rising costs on to customers.”
An Asda spokesman said: “Asda offers the lowest prices among traditional supermarkets on family’s top buys, from everyday essentials to the big brands they know and love, and independent surveys by Which? and The Grocer consistently show this.”
