Two years ago Unilever Australia-NZ became a B Corp. It was the first really large corporate, with household brands Surf and Persil, to join a scheme that’s been home to environmental hero brands such as EcoStore.  Why did Unilever join? What did they discover in the process? And what impact has a major corporate had on such a spirited brand as B Lab? Vincent was joined by Cam Heath, MD of Unilever NZ and Andrew Davies CEO of B Lab.