Mark WilliamsMark Williams grew up on the Isle of Arran and has been teaching about foraging for more than 35 years. His new book, ‘The Coastal Forager’ (Skittledog, £28), is out now. From coast to coast: Why seaside foraging is in our blood Our shingle, cliffs and beaches offer a veritable natural larder packed with succulent stems, umami-rich seaweed and aromatic herbs, says Mark Williams
