Purple flower on the Monsal Trail, Derbyshire

I think it's Knapweed.

thank you Hywel - I have found it in my Reader's Digest wild flowers book. Isn't it pretty? Wouldn't go amiss in a cottage garden border would it...

There's a cultivated form that you can grow in the garden. It's called Centaurea montana :)

Thank you Hywel,
I think I'll find a spot for it next year and butterflies and bees love it too...

Did you have another photo of one you didn't know ? I'm sure I saw one but I couldn't think of its name. I've remembered now but if you've deleted it, I am too late.