This is a rescued species having disappeared from its known haunts and then reintroduced from original stock. It has now spread naturally to other parts of the dune system closer to the sea so unlike some of these "gardening" experiments so favoured by conservationists it seems to have worked as intended.

It was known from these Lancashire dunes and on Jersey until 1986 when it "disappeared" and in recent times has only been found on the Sefton coast.