The English National Opera production. The Mikado is the Emperor of Japan, or so we are told in this best known of Gilbert and Sullivan's operas. In this updated version by Jonathan Miller for the English National Opera, the action takes place somewhat nearer home. Those who are accustomed to traditional productions will find the new setting gives fresh insights into an old favourite. Eric Idle's appearance as Ko-Ko, is his first in an opera — and the critics gave him rave reviews, as they did the whole of this talentedcast. The story goes: Nanki-Poo, heir to the throne of Japan, has fled from his father's court to escape the attentions of Katisha; he (Nanki-Poo) is madly in love with Yum-Yum whom he pursues disguised as a wandering minstrel; Yum-Yum, however, is engaged to Ko-Ko, the Lord High Executioner, who... But you'll have to watch it to find out the rest of the story.