Ridgefield Primary School. URN: 133311. Radegund Road, Cambridge, Cambridgeshire, CB1 3RJ. Good. Outstanding; Good; Requires Improvement; Inadequate; How long until the next inspection? Good schools are inspected around once every four years. We can also inspect at any time if we have concerns. We normally give notice the afternoon of the working day before an inspection. We can also inspect.