Warren was born and raised on the Island. After attending local schools, he worked as a journalist for many years, before retraining as a lawyer. He successfully lobbied against the Pennyfeathers development and opposes the imposition of unaffordable houses on the Island.
Warren is also a director of a legal charity that helps people with debt and welfare problems and has previously acted as the legal advisor for the Island campaign group, KILF. In that role, he brought legal action against the government’s attempt to scrap Island Line, who then U-turned, and invested £26 million into the railway.