Hi, I’m going to a ball in the summer. I always buy from ASOS, silk Fred or Karen Millen or monsoon maybe when I need this kind of dress. But I want it to be more interesting and less bridesmaid style. It needs to be floor / full length. Under £250. Not shein. I need to be able to try on and return if don’t like. What stores do you know that do nice, long, stylish, quality dresses?!