The office is a bland building near Chancery Lane. Neither its position, tucked away on a quiet backroad in the City, nor its facade, an iron grey home for grey suits, seems accidental. Founded in the US in 2003 and incorporated in the UK four years later, Nardello & Co is part of a lesser-known branch of London’s financial and legal ecosystem: corporate spies for hire. Professionals who trade in intelligence, often drawn from legal firms, law enforcement agencies, or government. They are brought in by major companies to gather sensitive or hard to find information on anything from allegations...