At the New Testament Church of God in Brixton Pastor Vernon Nelson makes a passionate appeal for a return to the traditional values of the Protestant ethic - hard work, high moral standards and the honest rewards of material success. His church is packed with obedient young people, joyfully proclaiming the truth of the Gospels and busily making progress with their careers. But are the increasingly popular black-led churches really answering the needs of Britain's black community? With songs and sermons the church members say yes; outsiders, many of them church drop-outs, are not so sure.