British cinema didn't only come of age with Reisz's film, or with this week's other re-release, The Loneliness Of The Long Distance Runner, made in 1962. Rather, it came into a different age. One in which the new boys (and girls), beneficiaries of Beveridge's Education Act, translated their post-war awareness of social ills into movies that were rough, realistic, iconoclastic (even nihilistic) and, above all, working-class. The Shaftesbury Avenue accent - that awful millstone-in-the-mouth that weighs down some of even the best pre-war British films --was out. The wagging tongues of