The hashtag ‘PrayForLondon’ is trending on social media. But so is ‘Antwerp’. Because no sooner were we invited to pray for London than a man of ‘North African descent’ was narrowly prevented from doing something similar in the Belgian city. This is life as usual in Europe now, of course. But among the endless replays to date – and the endless replays yet to come – there are several things worth noting about Wednesday’s attack in London.