If you have already been to the new Boutique 1 shop at the south end of Sloane Street, you’ll know there are plenty of reasons to celebrate the opening of the stunning store. So, while it may have opened its doors to shoppers this summer, last night Boutique 1 formally celebrated its London arrival with a party hosted by Lena and Ziad Matta, co-founders of Boutique 1, together with designers Roksanda Ilincic, Luella Bartley, Peter Pilotto and Christopher de Vos.