Topshop returns to the high street, but can it get its cool back?

ShutterstockFor teenage girls in the 2000s and 2010s, going into a Topshop store was like being transported into a fantasy world.There was music, makeup and fashion all under one roof - with Topshop clothes often found on the pages of Vogue alongside high-end couture.But somewhere along the way, things went wrong."Topshop lost its cool," said fashion journalist Amber Graafland."And when that happens, it's hard.…