'Go Back Where You Came From' ... is the ugly phrase of prejudice, the discordant command of bigotry, too frequently heard in the streets of our cities these days. The row about Enoch Powell 's suggested ' ministry of repatriation ' still rages; and the problem for coloured immigrants living in this country is hardly lessened when our vocabulary finds a new word added-' Powellism.' Supporters of Mr. Powell may not see this programme, may not be interested in the story of three West Indian families who did return home after trying to make a go of life in this country; who did, with reluctance and disillusionment, give meaning to the slogan they'd been shocked to find on walls here: Go back where you came from.' They came to Britain full of hope, holding British passports, confident of welcome from the mother country. Now they've undertaken their own ' voluntary repatriation.'