In the catalogue of Britten's compositions those involving a chorus, often without instrumental or orchestral accompaniment loom large. They stretch right across his working life, beginning in 1929 and ending in the Op 95 his last completed score finished a few months before his death. The four pieces recorded here belong in the first half of that period, the earliest of them dates from 1933, the latest from 1949, perhaps his most productive period. Mathew Best, as usual, does a wonderful job bringing these works to life.