Following a series of screenings which he organised at the National Film Theatre of independently produced short films including his own Every Day Except Christmas (about the Covent Garden fruit and vegetable market), Karel Reisz's Momma Don't Allow and others, he developed a philosophy of cinema which found expression in what became known as the Free Cinema Movement in Britain by the late 1950s. This was the belief that the cinema must break away from its class-bound attitudes and that the working classes ought to be seen on Britain's screens.