Last year, in the cigar bar of an opulent London hotel much favoured by visiting Arabs, an interesting conversation took place. My friend was rich enough to have two private jets and claimed to be doing private shuttle diplomacy between Israel and one of the Gulf states. Smoke curled around our heads and a young Qatari in Gucci trainers passed by with a woman my friend assured me was a Russian prostitute. My friend’s phone was out now and he was on a video call with a man he said was a senior official in the Iranian Revolutionary Guard. He asked him about a drone strike on Saudi Arabia’s two biggest oil refineries. The man chuckled. ‘Ah yes, that was us.’ Saudi Arabia’s oil production was briefly cut in half by that attack in September last year, but what really worried the Saudis was how the Americans did nothing more than issue a few tired words of condemnation.