Organisers of this autumn's designer catwalk shows have agreed to swap their preview dates so New York designers will not have to hold their shows on the first anniversary of the September 11 terrorist atrocities. In a statement, 7th on Sixth, organisers of New York Fashion Week, the Council of Fashion Designers of America and the British Fashion Council announced the revised dates for the Spring 2003 collections as September 12-17 in London and September 18-23 in New York.