Little more than a week after the attack on Westminster, Britain has largely dealt with the fallout in its characteristically stoical way. The dead have been paid their respects, silences have been kept, and the Brits have gone back to bickering about Brexit — albeit still under a heightened state of alert. But in the city of Birmingham, about a hundred miles north of the capital, many are grappling with the return of old suspicions about radicals within their midst.