Though I was born in Parsons Green, my father grew up in Pakistan, which acknowledges citizenship by descent. That means the home secretary could annul my Britishness, without even telling me, on the strength of a foreign entitlement I wouldn’t know what to do with. Apologists for executive discretion often argue that the innocent needn’t worry, but that complacent assumption misses the point. It isn’t only the notional risk of a despotic home secretary that’s disturbing. It’s the injustice of knowing that most citizens face no risk at all.