We discussed this issue a while back. I cannot remember the exact article, but it was along the lines of this one: http://www.dailymail.co.uk/femail/article-26

We discussed this issue a while back. I cannot remember the exact article, but it was along the lines of this one: http://www.dailymail.co.uk/femail/article-2644251/Un-scrambling-truth-Why-American-eggs-ILLEGAL-sell-UK-vice-versa.html http://www.dailymail.co.uk/femail/article-2644251/Un-scrambl... According to this, it is an issue of salmonella: UK eggs, for instance - which typically have more orange yolks than their American counterparts - are stored at room temperature, while those in the U.S. are required by law to be stored at lower than 45 degrees Fahrenheit in order to prevent the risk of Salmonella spreading. British grocery stores and households do not refrigerate their eggs because 90per cent of store-bought eggs in the UK come from hens that have been vaccinated for salmonella. edit: found it: https://news.ycombinator.com/item?id=5325540 https://news.ycombinator.com/item?id=5325540 It's been almost 2 years. That information was very sticky.