Next upgraded their profit guidance because hot weather is driving demand for summer stock, which is pretty straightforward retail logic. When demand spikes and inventory moves faster, retailers typically don't need to discount as heavily to clear shelves, so you'd probably see prices stay firm rather than drop. That said, retail pricing depends on a bunch of factors beyond just weather - competition, their inventory levels, when autumn stock arrives - so it's not guaranteed prices will rise either. Best bet is to watch their actual sales figures and inventory reports if you want to predict where their pricing might go next.