This week saw the first high-profile sign of Brexit affecting food company costs with a row between Unilever and Tesco over the supplier's request for 10% price hike. Our M&A pages were busy, with Tyson Foods investing in faux meat business Beyond Meat, Europe Snacks merging with fellow private-label snacks business Kolak Snack Foods and Kellogg snapping up Brazil's Parati Group.