LONDON – Sustainable textiles campaigner Livia Firth is to create her own exclusive clothing line for Marks and Spencer, featuring 25 clothing garments made from sustainable materials such as Better Cotton Initiative cotton, responsibly sourced wool and leather and suede from eco-tanneries. Dresses, jeans and outerwear will be among the collection to be included in more than 250 M&S stores around the U.K as well as on the company's website.