No Adults - Unless Escorted By Children -- A small boy entertains his playmates with glove puppets in the children's flat. In a smoky tenement block in London's slum quarter of Bermondsey is a three- roomed children's flat where boys and girls can do exactly as they wish and all adults are barred - unless accompanied by a child. The flat was provided by social workers. A warden, and her volunteer staff are always on hand if the children want help, but they never interfere or try to organise the