if you knew of a medieval building that was in very original condition but for some reason remained unlisted , even though everybody who seen it stated that it should be (estate agents etc etc) whose owners were planning on tearing down walls , plastering over original daub etc etc with no knowledge of preservation of old buildings what so ever meaning that the fabric of the old building could/would be lost for ever , what would you do? or more to the point , what could you do?