Inflation fuelled by Iran conflict deterring shoppers, especially in the US, says high street chainJD Sports boss is still struggling to turn up the heatThe sports fashion retailer JD has cut £50m from its profit forecast as cost of living pressures, fuelled by the US war on Iran, weighed on sales of trainers.JD Sports, which sells brands including Nike and Adidas, said widespread inflation had hit shoppers’ wallets, particularly its core young shoppers, resulting in a drop in sales across impor