Stage Director Robert Carsen sets his enormous outdoor Bregenz Festival production of Verdi's Il trovatore on a floating oil rig, suggesting that the petrochemical industry is behind all the emotions of the various characters. Thus Azucena is a hippy protester, Leonora a wealthy oil princess, Manrico a terrorist an so on. It's all great fun and expertly done, even if it's totally bonkers (a posh party and a procession of nuns on an oil rig? Hmm!). The singing renges from good to excellent – Georgian soprano Iano Tamar is a sensational Leonora – but the use of electronic amplification makes it all look slightly out of sync.