Blackstone boss Steve Schwarzman had his pick of parties to attend at Davos and dipped into the Barclays dinner and a Yale University cocktail function beforehand on Wednesday night.

At the swanky Barclays dinner at the Schatzalp, on the mountainside above the Swiss ski resort, guests including steel scion Aditya Mittal and EU Commissioner Charlie McCreevy heard from one of the more unusual Davos delegates, Boris Johnson .