London fashion week: Day four in pictures

The Erdem spring 2011 collection Photograph: Katie Collins/PA The Erdem spring 2011 collection Photograph: Katie Collins/PA The Mark Fast spring 2011 collection Photograph: Ben Stansall/AFP/Getty Images The Mark Fast spring 2011 collection Photograph: John Phillips/UK Press The Christopher Kane spring 2011 collection Photograph: Yui Mok/PA Photograph: Yui Mok/Action images US Vogue editor-in-chief Anna Wintour and Vogue European Editor at Large Hamish Bowles attend the Christopher Kane show during London fashion week Photograph: Yui Mok/PA The Christopher Kane spring 2011 collection Photograph: Ian Gavan/Getty Images The Holly Fulton spring 2011 collection Photograph: John Phillips/UK Press The Paul Smith spring 2011 collection Photograph: Ben Stansall/AFP/Getty Images Nicole Farhi is seen backstage during her fashion show Photograph: Ben Stansall/AFP/Getty Images The Nicole Farhi spring 2011 collection Photograph: Fiona Hanson/PA