Montagu Slater new. Slater's original libretto, which he published himself (to the annoyance of Britten and Peter Pears, who had made a number of amendments to it before the opera was staged), is cast in three acts. It omits the repetitions necessary in the actual opera. Anthony Burgess, writing in The Listener (magazine) in 1964, stated: “The excellence of Peter Grimes has a great deal to do with Montagu Slater's libretto, the only libretto I know that can be read in its own right as a dramatic poem.” He also wrote the libretti for `Yerma’, composed by Denis Aplvor. Slater was involved,
Scottish Opera including the Barclays TMA Award for Outstanding Achievement in Opera for "Macbeth" and "Der Rosenkavalier" (both in 1994) and for "Die Walküre" and "Siegfried" (both in 2002), as well as the South Bank Show Award for "Best Opera" for the "Ring Cycle" (2004) and a Herald Angel Award for "The Two Widows" at the Edinburgh International Festival in 2008. Scottish Opera has also staged many successful productions abroad, including "Albert Herring" in Florence, "Egisto (opera)" in Venice, tours in Germany, Austria, Portugal, France, Switzerland, Yugoslavia and Iceland and recent years including "Peter Grimes" and "Tristan und Isolde" in Lisbon; "Macbeth"