Grant Harrington of Ampersand Cultured Butter is on a mission to make butter taste more buttery. He makes artisan cultured butter, buttermilk and fresh cheeses and has supplied over 15 Michelin-starred restaurants with his buttery delights. He was previously a chef at Gordon Ramsay’s Maze and Pétrus, a private chef for the Duke of Westminster and pastry chef at Fäviken, Sweden.