As London Fashion Week opens, Mary Beard and her panel of guests discuss the art and ethics of the clothing industry. When can fashion genuinely be regarded as an art form, and who is high-end designer fashion actually for? From the hijab to the hoodie, how do the clothes we wear communicate who we are to other people? And given recent controversies around sustainability and cultural appropriation, does the rag trade need to clean up its act? And Mary talks to designer Hussein Chalayan about when fashion can truly be described as an art.