Champagne to Martin Bradshaw of Preston for cracking our trick question last week. The first image showed the British Library by Colin St John Wilson, the middle image showed Enrico Caruso dressed as Pagliacci, and the final image was of Walsall Art Gallery by Caruso St John. The middle image was the odd one out as the other two are both buildings designed by a St John. There is, of course, an equally compelling argument that the British Library is the odd one out because there is no Caruso involved. To win a bottle of champagne, send an odd postcard by first thing Monday morning please to: AJ Astragal, 151 Rosebery Avenue, London EC1R 4GB, or in an emergency, fax your answers to 0171 505 6701.