M&S school uniform (Image: M&S)M&S has built its reputation on producing uniforms that keep their shape and appearance despite daily wear. Best for: Comfortable, hard-wearing school uniforms that offer excellent value for money and are built to last the entire school year. Aldi school uniform (Image: Aldi)Aldi – Best for super low pricesFor parents trying to keep back-to-school costs to an absolute minimum, Aldi once again tops the class with its famous £5 School Uniform Bundle. It's one of the retailer's strongest back-to-school offers, especially for families buying school shoes, PE trainers and weekend footwear in one shop. The school uniform sizing mistakes costing parents moneyBuying school uniform a little bigger to allow for growth can save money over the school year – but experts warn there's a limit.