UK crisp manufacturer Tyrrells Crisps has acquired the Melbourne, Australia-based Yalla Valley, a producer of natural, organic and gluten free snacks. The company has the backing of Investcorp, an investment company. The acquisition aims to speed up Tyrrells’ expansion in the Australian market a year after the launch of the firm’s hand-cooked crisps range. “This acquisition demonstrates that we are serious about international expansion for the Tyrrells brand. Our hand-cooked …