Bush's return to composing after the war led to what Richard Stoker, in the "Oxford Dictionary of National Biography", calls "his best period". However, Bush's attempts to secure a place in the concert repertoire were frustrated. A contributory factor may have been what the critic Dominic Daula calls Bush's "intriguingly unique compositional voice" that challenged critics and audiences alike. But the composer's refusal to modify his pro-Soviet stance following the onset of the Cold War alienated both the public and the music establishment, a factor which Bush acknowledged 20 years later: "People who were in a position to promote my works were afraid to do so. They were afraid of being labelled". Stoker comments that "in a less tolerant country he would certainly have been imprisoned, or worse. But he was merely ignored, both politically, and, which is a pity, as a composer". Nancy Bush writes that the BBC considered him "persona non grata", and imposed an almost complete though unofficial broadcast ban that lasted for some 15 years after the war.