LONDON — Britain in 2026 is a place where Jack Hur doesn’t feel safe wearing his Star of David pendant. It’s where some Jewish mothers tell their teenage sons to remove their kippot before boarding the tube. It’s where dinner-table talk of leaving the country no longer seems outlandish. Standing behind the counter of Sulam’s Kosher Food Store, Hur, 32, produces his Star of David necklace from underneath his sweatshirt. From his back pocket he reveals a kippah. “I only wear this sometimes,” he