Last week's champagne winner was J Eger of London SE5. The answer was Ron Arad's house design in Hampstead for an Airedale. This week's clue: Construcing a swift revolution. Answers by Monday morning on a postcard, preferably doggy, to AJ Astragal, 151 Rosebery Avenue, London EC1R 4QX, or in emergecny fax 0171 505 6701. Champagne for the winner.