Correct me if I'm wrong, but I think this is a Michaelmas Daisy which is just flowering in my garden (I am wrong!!!!!). I liked the sunlight shining on this flower and took this just before the sun moved round behind the trees
I've got a feeling this is Greater Knapweed (Centaurea scabiosa). The Cornflower (Centaurea cyanus) flowers aren't as 'ragged' and appear to be a definite blue.