LONDON - Scott Martin, co-founder of Coffee Nation, helped transform the British coffee market by introducing the UK’s first premium self-serve espresso solution at a time when instant coffee dominated. By combining real espresso with fresh milk, Coffee Nation challenged assumptions about what vending-machine coffee could be. After Whitbread acquired the business and rebranded it as Costa Express, Martin led its rapid expansion, growing revenues tenfold to $500 million. He helped pioneer the autonomous coffee retail model—one that later proved essential during...