Supposedly the attackers were deterred, but it wasn't the type of event /pol/ had wanted, rather it seems to have been meant as a shift of power carried out by some British secret society. The infernal queen said it was irrelevant in the long run. Worth noting however that Trump wasn't there, Erdogan refused because he would have to go by bus, and Xi and Putin weren't there either. Had something happened, all of those would be safe still.