The Government is preparing for potential food supply disruptions this summer amid fears that escalating tensions involving Iran could severely impact global shipping routes. A confidential contingency exercise, known as 'Exercise Turnstone’, has explored the consequences of a prolonged closure of the Strait of Hormuz, a vital trade corridor. Central to these concerns is a possible shortage of carbon dioxide, an essential component in food preservation, packaging, and livestock processing. In a worst-case scenario, supplies could drop dramatically, affecting meat production, supermarket availability, and the hospitality sector. Critical services, including healthcare, could also be at risk, as carbon dioxide is used to preserve blood, vaccines, and transplant organs. The Government has already taken steps to mitigate risks, including restarting a key bioethanol plant and preparing emergency powers to prioritise supply distribution if needed. While widespread shortages are not yet expected, officials warn that reduced availability and public concern could still create significant disruption across the nation.