The UK’s seemingly endless supply of fresh fruit and vegetables may be heading for a difficult test. A powerful El Niño climate pattern developing in the tropical Pacific is threatening to disrupt harvests across major producing regions, with consequences that could eventually reach British supermarket shelves and household budgets.
The warning, reported by The Observer UK on 17 September 2026, comes as the UK’s scientific advisers caution that food security around the world is likely to deteriorate as adverse weather linked to El Niño affects agricultural production. The phenomenon releases heat from the tropical Pacific Ocean into the atmosphere, contributing to drought in some regions and heavy rainfall in others.
The potential disruption is already becoming visible in the supply chains on which British consumers depend. Avocado growing seasons in Peru have been shortened by higher temperatures, while shortages of smaller and medium-sized fruit have forced retailers to adjust promotional plans. Mangoes and grapes in parts of South America could become increasingly vulnerable to fungal disease if extreme rainfall arrives close to harvest.
For British consumers, the significance lies in how little of the country’s fresh produce is actually grown domestically. Although UK farmers produce sufficient quantities of staples such as meat, milk, eggs and wheat to meet most domestic demand, the country relies heavily on overseas growers for fruit and vegetables. Imported fruit accounts for more than 80% of supply.
That dependence has traditionally been managed through an international relay system. As growing seasons change, British suppliers shift from one producing country to another, allowing supermarkets to maintain the appearance of uninterrupted availability throughout the year. But El Niño threatens precisely that system of careful seasonal planning.
“What consumers are likely to see is short-term shortages of some products,” said Emilie Vanpoperinghe, co-founder of Oddbox, which sources surplus and misshapen fruit and vegetables from farmers and delivers them to consumers. “There will be change in sizing, changes in pricing, but it is difficult to predict.”
As conditions become more difficult in producing countries, the effects are not necessarily confined to individual crops. In Peru, for example, warmer conditions have accelerated avocado growth, disrupting the usual balance of fruit sizes and bringing the season to an earlier end. The result is a shortage of small and medium avocados and changes to retailers’ promotional plans.
The pressure on asparagus illustrates another vulnerability. Julian Marks, chief executive of Barfoots, which supplies retailers with vegetables including sweetcorn and aubergines, said yields of asparagus from Peru had fallen by 25%, while quality had also deteriorated. “They have less shelf life because the plants are more stressed,” Marks said.
There is little room to replace Peru immediately. “For asparagus, Peru is really the centre of global production until Mexico kicks in, in February,” Marks said. His description of the supply chain as a global relay race captures the dependence built into modern British food retailing. “We run relay races around the world to ensure consistent availability and quality of produce.”
That system is now facing pressure from several directions simultaneously. The exceptionally hot British summer has already reduced yields of heat-sensitive crops such as peas, while farmers are also dealing with higher fertiliser and fuel costs. El Niño is projected to bring heavy rainfall to the UK during the winter, which could replenish aquifers and reservoirs depleted by the summer drought but could also damage British agricultural production.
Livestock farmers could face additional costs if flooded fields force cattle indoors and increase the need for feed. What appears to be a distant climate phenomenon in the Pacific can therefore create a chain of effects extending from overseas farms to British fields and ultimately to supermarket prices.
The potential consequences extend beyond fresh produce. Major rice-producing countries, including India and Thailand, are expected to face adverse weather linked to El Niño. According to the UK government’s scientific advisers, lower harvests and possible export controls could push rice prices higher.
The world is already entering this period with food commodity markets under pressure. Global food commodity prices reached their highest level since 2022 in August, amid concerns about threats to supply, including weather and war-related disruption. The financial consequences of an earlier major El Niño provide a measure of the potential scale: the worldwide agricultural losses associated with the 1997-98 event, one of the strongest on record, have been estimated at $35bn-$45bn.
Yet consumers may not immediately see the full effect on supermarket shelves. Retailers have powerful incentives to hold prices down, particularly for products whose prices shoppers closely monitor. Food prices have already risen sharply since the pandemic, putting pressure on households and making it difficult for suppliers to pass on additional costs.
Christian Jaccarini, an economist at the Energy & Climate Intelligence Unit, said food producers had struggled to negotiate higher prices with retailers. “Supermarkets are locked in intense competition with one another and have a lot of bargaining power over food producers,” he said.
Bananas provide an example of how this pressure operates. They are among the most popular items in British shopping baskets, alongside milk, yet their retail price has remained flat for decades. Retailers are particularly reluctant to increase prices on such “known value items”, because consumers familiar with their cost may switch to competitors.
That does not mean the pressure disappears. Instead, some of it is absorbed further up the supply chain.
“The inflationary pressures are still there, but much of it is being absorbed upstream for now, meaning this wave of inflation has likely been delayed rather than avoided,” Jaccarini said.
The same dynamic could eventually affect products that are not normally regarded as essential. Coffee and chocolate may appear discretionary, but they occupy a significant place in British diets. Chocolate is particularly exposed because much of the world’s cocoa is produced in just two countries, Côte d’Ivoire and Ghana.
Britain’s appetite for chocolate gives that vulnerability unusual economic significance. Chocolate accounts for almost 6% of the basket of food and non-alcoholic drink used by the Office for National Statistics to measure consumer price inflation, compared with a European average of 2.3%.
The deeper issue is therefore not whether one particular fruit becomes temporarily more expensive or whether a single harvest fails. It is whether the year-round abundance familiar to British consumers can continue when increasingly unstable weather disrupts the international chains that make that abundance possible.
“The sense of abundance that we have as consumers today… the removal of seasonality from people’s minds, the idea that you can have a mango on New Year’s Day – that’s something that could disappear,” Marks said.
El Niño may eventually weaken, but the disruption it is now threatening exposes the complexity of the system behind Britain’s supermarket shelves. For consumers accustomed to finding the same fruits and vegetables throughout the year, the next shock may come not from a shortage at home, but from a harvest thousands of miles away.
