The trendy face of ethical fashion is Visa Swap - a make-shift 'pop-up store' in a Covent Garden loft where you can take your unwanted clothes and exchange them for someone else's. Last night saw the launch of their July 2008 season, where perpetual party girls Margot Stilley and Olivia Inge joined the throng to check out the in-store fashion show of swap-shop ensembles.