sentences:  In an essay on the Festival, Michael Frayn characterised it as an enterprise of "the radical middle-classes, the do-gooders; the readers of the "News Chronicle", "The Guardian", and "The Observer"; the signers of petitions; the backbone of the B.B.C.," whom he called "Herbivores".In Frayn's view, "The Festival was the last, and virtually the posthumous, work of the Herbivore Britain of the BBC News, the Crown Film Unit, the sweet ration, the Ealing comedies, Uncle Mac, Sylvia Peters.