LONDON, United Kingdom — In the midst of London Fashion Week in September 2017, COS hosted a blowout party at the National Gallery to celebrate a decade in business. Guests — including Olympic diver Tom Daley, model and designer Jasmine Guinness and wellness entrepreneur Jasmine Hemsley — sipped blackberry and apple martinis and bergamot negronis amid a neon forest light installation before enjoying a set by drum-and-bass group Rudimental.
The apparent success of the brand fashion…

