This grower is sure of this plant identification.
Mat-forming native wildflower of shingly beaches with delicate heads of nodding scented flowers
Nottingham catchfly, Catchfly
Silene nutans (Nottingham catchfly). This species grows as a wild flower in Britain & Northern Europe.
They are fully to frost-hardy plants, they like fertile, well-drained soil with full or partial-sun. You can propagate from seeds in the spring or early autumn or from cuttings in spring.
Grown for their mass of 5 petalled flowers.