SEVINGTON, England (AP) — Four years after Britain voted to leave the European Union, Brexit can still seem abstract. But in the county known as the Garden of England, it is literally taking concrete form. Just beyond the ancient oaks and yews that surround medieval St. Mary’s Church in the village of Sevington, bulldozers, dump trucks and cement mixers swarm noisily over a field. They are chewing up land to create part of Britain’s new border with the European Union — a customs clearance depot with room for up to 2,000 trucks. No one asked local people for permission, and...