If the deal does go through, what effect would that have on rivals? Waitrose is the one with most to lose. With a tiny 5% of the market, it’s hard to see how it might survive solo. By contrast, Morrisons is probably in the best position to buy stores the new combo might have to sell. Once fattened up, Morrisons would be a tasty fit for Amazon. Tesco, which only until recently was fighting off claims of being a Tescopoly, will have to stay on its toes. No wonder supermarket chiefs are terrified. As the great Andy Grove, the late boss of Intel, used to say: “Only the paranoid survive.”