For some time now I have been trying to identify this flower. I apologise for the terrible picture but it's all I have. The plant is growing in a clump in a hedgerow in Caithness and I have seen them (This photo) in Arisaig on the west coast of Scotland. I don't know if it is a European/British wild flower or an escapee from gardens. The plant grows about 30-40cm tall. It flowers in late summer and dies back in winter, emerging once again in spring, so I am assuming it's a perennial. Can anyone point me in the right direction for an ID, please?

https://farm3.staticflickr.com/2924/...941be899_b.jpg