No Longer European, a Divided Britain Seeks a New Identity

Brexit radicalized a nation. Now, as some mourn and others celebrate, the U.K. must find itself again.

At 10 a.m. inside Aux Merveilleux de Fred, a patisserie in the heart of London’s French quarter, the air is thick with the aroma of butter.

Aicha Boubakri, 30, is arranging neat rows of pastel-colored cream pastries in front of the bakery’s only customer.

“It’s a bit sad—the fact that the U.K. will …