Pink Flowers, Blue Sky

Walking across the fields by the sea where we often walk our dog, Barley the lovely Lurcher, I saw these beautiful splashes of bright pink against the blue sky.
So I took a couple of photos. The flowers definitely brightened our morning dog walk, because as you can see, the sky did have some blue, but the clouds were coming over thick and fast.
Despite the pink blooms it feels like Summer is saying goodbye for this year.

I don't know what this plant, these flowers are, but they were quite tall, elegant, and a vibrant pink.

Do you know anything about wild plants/flowers? Do you know what these are called?