Tesco customers have expressed their disbelief after the supermarket appeared to take extreme security measures in one of its stores. Taking to a Reddit , one shopper shared a snap of the refrigerated aisle where cheese is the subject of anti-theft control . The image showed £3.45 blocks of Tesco's own-branded cheddar and 30% reduced fat mature cheddar locked away inside plastic enclosures. " Security box?" asked the Reddit user in a caption. "Is there actually a cheese shoplifting epidemic?"