The speculation over the future of Kettle Chips owner Diamond Foods stepped up a gear this week with claims in the US the company is in advanced talks to sell up to Kellogg. One notable deal cleared an important hurdle after UK competition officials cleared Muller's move to buy Dairy Crest's liquid milk business. And the debate over sugar in the country intensified after executive agency Public Health England called for a series of measures - including a tax - to cut intake.