Primark has long been a staple of UK high streets, luring in shoppers with low-priced clothes, accessories and homeware. But in its UK and Ireland stores, like-for-like sales - a key metric in the retail industry - were down 3.1% in the year to September, which it attributed to a "weak" consumer environment and fewer people buying winter clothes during last year's mild autumn. As online stores like Shein and Vinted continue to attract young shoppers, does Primark face a fight to remain relevant