Supermarkets in the UK are experiencing a shortage of fruits and vegetables due to adverse weather conditions in Europe and North Africa, disrupting supply chains. The situation is further complicated by Brexit and the need for the UK to import most of its produce from warmer climates like Spain, Morocco, Tunisia, and Egypt. High production costs, including heating greenhouses, are also impacting domestic production. Retail chains have had to implement product rationing to manage the shortage, with customers limited in their purchases. The situation is expected to persist for a few more weeks, leading to concerns about panic buying.