Tyrrells, the private equity-backed UK crisp maker, has enjoyed robust growth in recent years and, through exports, steadily built a business outside its domestic market. However, the company, under CEO David Milner, has started to use M&A to boost its international operations. Last month, Tyrrells snapped up Aroma Snacks, a German supplier of organic crisps. In the first part of a two-part interview, Milner tells Dean Best why Tyrrells moved for Aroma Snacks.