What is "flannelled fool"

n. (context British idiomatic English) A cricketer (from his white flannel trousers).

Flannelled Fool is an autobiography by T. C. Worsley, published in 1967. It takes its title from a phrase in "The Islanders", a poem by Rudyard Kipling.

Though Flannelled Fool is subtitled A Slice of a Life in the Thirties, much of it treats the author's childhood and education before he began a schoolmastering career in 1929.