Diamond Foods' move for global snacks brand Pringles was the stand-out story this week, with the US snack firm set to add to a burgeoning stable that already includes Kettle Foods. Elsewhere, Smithfield Foods announced plans to take a majority stake in Europe's largest packaged meats maker Campofrio, while Marks and Spencer struck an upbeat tone as it published its latest sales figures. Click on the headlines to find out more.