Patches of tiny white flowers growing within inches of the road, Danish scurvy grass is a halophile (salt lover). It now grows where briny splashes from winter gritting land anywhere it can put down roots.
Up to the 1960s it was found in Britain, but only as a rare plant growing right by the sea. But gritting roads began to be done more systematically, and the slipstreams created in the growing of traffic helped spread the seeds of the plant, which is now common in early spring.