Purple pointy flower -- periwinkle?

Purple pointy flower -- periwinkle?

Observation - Purple pointy flower -- periwinkle?. Description: I found this flower roadside in Cressbrook, Derbyshire this week. I have several wild flower books but none of them seen quite right. Looks most similar to the periwinkle but the petals are too long, thin and pointy for this methinks

I found this flower roadside in Cressbrook, Derbyshire this week.

I have several wild flower books but none of them seen quite right.

Looks most similar to the periwinkle but the petals are too long, thin and pointy for this methinks