The Guardian reports Sunday that Heston Blumenthal has temporarily closed his London restaurant Dinner after an outbreak of the same winter vomiting virus that was linked to contamination at another of his restaurants, Fat Duck, five years ago. The chef said he was erring on “the side of extreme caution” by shutting the establishment in the Mandarin Oriental hotel overlooking Hyde Park after a number of guests and employees fell ill. Dinner specializes in historic British dishes and has two Michelin stars. It has also been rated in the world’s top 10 restaurants. Food safety officers have told staff to wash their hands more often. Blumenthal’s Fat Duck restaurant in Bray, Berkshire, was hit by an outbreak involving at least 240 people in 2009. It was later said to be the worst norovirus contamination at an English restaurant.