The disappearance of estate agent Suzy Lamplugh in July 1986 remains one of the most consequential unsolved cases in British professional history, not because of legal resolution — there has been none — but because it fundamentally reshaped how an entire industry thinks about risk. Forty years on, Propertymark's decision to publish updated personal safety guidance for agents, covering risk assessments, staff training and check-in protocols, is a reminder that the structural vulnerability at the heart of estate agency work has never fully disappeared. It matters to investors and landlords not as a sentimental anniversary story, but as a live operational and liability issue that touches valuation visits, viewings, lettings inspections and every other moment an agent enters a property alone with a stranger.