Gene-edited strawberries and tomatoes have reached a critical milestone toward being sold in the United Kingdom for the first time, marking a significant development in the country’s agricultural biotechnology landscape. The UK government has granted marketing approval to several varieties of these gene-edited fruits, which now await final clearance from the Food Standards Agency (FSA) before entering retail markets.

Among the approved products are “sunshine” tomatoes developed by the John Innes Centre in Norfolk. These tomatoes have been genetically edited to contain elevated levels of vitamin D, comparable to the amount found in two eggs or 28 grams of tuna. This enhancement was achieved by disabling a gene responsible for converting vitamin D3 into cholesterol, allowing the vitamin to accumulate in the fruit and leaves. The Department for Environment, Food & Rural Affairs (Defra) highlighted the potential health benefits of the biofortified tomato, citing its role in combating widespread vitamin D deficiency in the UK. The centre also plans to crossbreed the vitamin-enhanced tomatoes with sweeter, striped varieties to increase consumer appeal.

In addition, eight strawberry varieties created by U.S.-based company Simplot have been approved. These gene-edited strawberries are engineered to produce fruit over an extended season by turning off specific genes, potentially boosting local supply and reducing reliance on imports. Researchers emphasized that these strawberries retain the same taste, flavor, and nutritional profile as conventional varieties.

These gene-edited crops are subjected to rigorous testing standards equivalent to or exceeding those applied to traditional plants, according to Professor Cathie Martin, who oversees the tomato research. The technology used involves precise alterations to the plant’s existing DNA, differing from genetic modification techniques that introduce foreign genes. Other gene-edited products recently approved by Defra include disease-resistant potatoes, high-fat barley for livestock feed, and wheat varieties with decreased levels of a chemical associated with cancer risk.

One notable regulatory aspect of these products is that they will not require labeling to indicate their gene-edited status when sold to consumers. This reflects the UK’s currently more permissive approach to gene-editing technology following Brexit, contrasting with the European Union’s stricter rules.

However, there is uncertainty surrounding the future of gene-edited crops in the UK. Reports suggest that a proposed agreement between the UK and the EU, negotiated under former Labour leadership, could impose tighter regulations aligned with EU standards, potentially restricting gene-editing applications. This has provoked concern within the industry and among politicians who advocate maintaining the UK's post-Brexit regulatory freedoms to foster innovation and food production.

Diego Durantini, programme manager at the John Innes Centre, described Defra’s approval as a vital step toward commercial availability, emphasizing the growing need to address vitamin D deficiency. The gene-edited “sunshine” tomato represents a potential low-cost, plant-based solution to improve dietary health within England and potentially beyond.