The hottest day of the year turned into a beau­ti­ful evening, and at Hyde Park, Arcade Fire gave a tru­ly inspired per­for­mance. No doubt the band were mak­ing sure that this, their last night of the suc­cess­ful Reflek­tor tour, would be one for us, and them, to remem­ber. Win But­ler was more engag­ing, and more humor­ous, than…