Once snubbed by the closed world of fashion, influencers are now courted like the biggest celebrities, in particular by emerging talents who count on them to establish their name. They are present en masse this week at London Fashion Week. The cream of TikTok and Instagram flocked to Masha Popova’s fashion show on Sunday September 18. The young Ukrainian designer, who graduated from Central Saint Martins in 2020, included among her guests TikTok superstar Abby Roberts, followed by 16 million people, and her sister Charlotte Roberts, who has nearly 9 million followers. Emma Winder, content creator on Instagram, TikTok and…