His pieces are sometimes poems, and sometimes written in novel forms of language, such as the Romance-eschewing Anglish, or that of a toy 19-letter "pipewipen" (typewriter). Other articles were extended flights of fancy, such as "The Unthinkable Carrier" based on the idea of cutting Britain free of the Earth's crust so that it could float around the oceans and guarantee world peace, with the Isle of Wight kept in place by a tow chain. In a late 1950s piece, "Sleep for Sale", he prefigured the concept of the capsule hotel ("Over to you, capitalists. But remember, I thought of it first."). Several of his pieces touched on the invented philosophical movement of Resistentialism, a concept that probably owes some of its force to the contempt that Jennings—a devout Catholic—felt for the intellectual fashion he was parodying.