I have been there a few times in the past and the word 'gardens' really undersells the place. It's a very extensive piece of land. Under the 'links' section of the website there are three videos (the first one is broken) which give a good idea of what the gardens are like. Other people will know better than me whether the outer reaches is the sort of habitat which could support a family of Goshawks.Is the elephant in the room the previous sentence in the same paragraph that states they have a pair of breeding "Northern Goshawks" in the gardens too? Is that likely?