In Bristol, flat-sharing undergraduates Dylan, Ben, Roo and Louis seek advice from Gregg Wallace and Chris Bavin on improving their diets. Roo is a Coeliac and Ben a vegetarian, so they shop separately and rarely cook or eat together, and expensive tastes and love of brands mean that they're blowing their student loans on pricey pesto and pasta. Plus, Chris goes to Durham to see what the difference between boxed and bottled wine actually is and dietitian Priya Tew discusses plant-based diets and the potential benefits of eating less meat.