Thanks for all the lovely words! 
And geoff - I wish I could claim it was all meticuously planned, but mine has been very much trial and error and learning as I go. Previous gardens have been much more 'washing machine', so this is a departure for me and it turns out that the 'rules' of planting are quite different (I'm still not sure what they are and there are some gaps currently where things need to grow up a bit bigger - there's a deutzia next to that silvery pittosporum that I'm just willing to grow up a bit more, for instance!!) Some of those poor plants have been moved 3 times. So just go for it, and if it's wrong, you can shift it out again!!
The Dan Pearson garden at Chatsworth was really interesting. It is incredibly naturalistic, to the point that some people were walking past quite oblivious to the fact that it was landscaped. The occulus oak and the bridges are wonderful - the stream has been carefully, carefully shaped and sounds absolutely lovely - but the planting, while artful and clever, is just a touch underwhelming. In particular, there just aren't enough plants in there - they've gone for something very low maintenance and there is a fair bit of bare earth still. I'll try to post some pictures soon so you can see!
Elsewhere in Chatsworth, the Paxton garden is looking better - they are relandscaping it in a more traditional National Trust way, and I think once they've worked all the way down, it'll look great. Also, I got lost in the maze 
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I managed to squeeze in a visit to Dunge Valley gardens as well. I have never seen such a riot of rhodos in my life. It is quite otherworldly, because you walk up a small ravine at the top, looking down at the plantings, and it feels like being abroad. And how they planted some of the steep, steep slopes without a climbing harness I do not know. Rhodos are not my favourite plants, but it's impossible not to admire the dedication to them here.