Complex sentence: The park is a national nature reserve, a Site of Special Scientific Interest and a Special Area of Conservation and is included, at Grade I, on Historic England's Register of Historic Parks and Gardens of special historic interest in England.
Split into simpler sentences: The park is a national nature reserve, a Site of Special Scientific Interest and a Special Area of Conservation. It is included, at Grade I, on Historic England's Register of Historic Parks and Gardens of special historic interest in England.