Temporary Additional Defences, Conisbrough Castle, Conisbrough, 22/09/15. 24 Thursday Sep 2015 Posted by Mr. B Flaneur in Out and About., Yorkshire. ≈ 1 Comment TagsBritish History, Castle, cones, Conisbrough, Conisbrough Castle, English Heritage, Fortifications, Medeival, Middle Ages, Ruins Traffic cones – The first line of defence.