It is a steeply sloping site divided into a northern half , which is always open to the public .
Is of lesser ecological value , and a southern part which is in a better state of conservation , and which is only open at weekends .
It is a steeply sloping site divided into a northern half , which is always open to the public and is of lesser ecological value , and a southern part which is in a better state of conservation , and which is only open at weekends .