c) it is within a distance of 2 kilometres from the perimeter of a scheduled monument and is 50 metres or more in height, or has an area of 0.5 hectares or more
(c) ei fod o fewn pellter o 2 gilomedr o berimedr heneb gofrestredig a bod ei uchder yn 50 metr neu ragor, neu fod ei arwynebedd yn 0.5 hectar neu ragor