You walk around and it might be Westminster or the Manchester Arena or London Bridge, or even New York in the days after 9/11. In the shadow of Grenfell Tower, the trappings of grief: the signs pleading for the safe return of the missing, the vigil candles, the notes and messages left for the dead. People stand in stunned clusters, talking to each other, to police, to reporters, telling of the horror they’ve witnessed, recalling the pain of a friend’s final message or a father whose phone rang and rang but was never answered.