Panicked, tearful crowds streamed toward the Piccadilly Circus tube station, where police were trying to impose order.
The Los Angeles company is now suing the Swedish fast-fashion retailer alleging use of its name on pieces sold at H&M stores and online.
Fast-fashion retailers are fighting back against trademark infringement claims, while LuLa Rose faces a potential class-action lawsuit from sales reps over changes in terms.
Retail, luxury stocks were mostly down.
Retail and luxury stocks were also mostly down in morning trading on Friday.
Five winners will share a one million euro grant for ideas introducing sustainability to the fashion industry.
H&M’s new concept store will stock the label’s own range of minimalist Scandi-inspired clothing as well as a selection of shoes, accessories and homeware.
The Swedish fast-fashion retailer said publishing the figures on a monthly basis could be misleading.
The Swedish fast-fashion retailer anticipates a 7 percent increase in local currency sales in June.
Speakers from H&M, Lemlem and Glam4Good shared their views during a panel discussion.