HOW BRITAIN BECAME AN ISLAND
round 18,000 years ago, during the Pleistocene Epoch, the majority of modern-day Britain was covered in ice. This period of glaciation persisted for thousands of years, lasting until around 12,000 years ago after a warming climate brought the icy expanse to an end. In the wake of the ice age, today’s North Sea and the English Channel were filled with grassy marshland, wooded valleys and swamps. This area of land, known as Doggerland,
