Complex sentence: A week after TopShop owner Philip Green announced that supermodel Kate Moss had signed a deal to design clothes to be launched in 2007, Shepherdson resigned from Topshop, and was producing, unpaid, a fashion chain for Oxfam, aimed at "ethically conscious shoppers".
Split into simpler sentences: A week after TopShop owner Philip Green announced that supermodel Kate Moss had signed a deal to design clothes to be launched in 2007, Shepherdson resigned from Topshop. Since resigning from the brand, she is now producing a fashion chain for Oxfam, aimed at "ethically conscious shoppers".