Love it or loathe it, the powerhouse effect is back at English National Opera. The era which gave its name to the sobriquet, that challenging time in the 1980s and early 1990s when Davids Pountney, Alden and Fielding skewed the stage and Mark Elder matched their vision in the pit, now has an equal. The ENO calendar year has just ended with Rupert Goold's Chinese restaurant shake-up of a Turandot , everything we saw beautifully thought out and focused to knife-edge brilliance, and every sound emanating from the ENO Orchestra and Chorus under Ed Gardner sensual-perfect. Alas, the kind of vigorous debate it's generated is hardly reflected in Susie Gilbert's hard-working, diligent history of the company.