The cheapest supermarket in the UK is Aldi, according to the latest study by Which?. A trolley full of 70 everyday items from the German retailer in September came in at just £60.01—an average of less than 86p per item. Competing discount supermarket Lidl came in second-cheapest at £63.66 for the same shop.The study looked at the price of a trolley of 70 staple grocery items including pasta, bread, yoghurt and vegetable oil from Aldi, Asda, Lidl, Morrisons, Ocado, Sainsbury’s, Tesco and Waitrose. A second test looked at the price of a larger 150-item shop which included more branded items. For the 150 item shop, Asda was the cheapest supermarket at £232.87—Aldi and Lidl were excluded from this second test as they don’t stock all of the items. Morrisons was the next cheapest for a big shop at £245.54, followed by Tesco (£249.09), Sainsbury’s (£253.07) and Ocado (£278.55).Perhaps unsurprisingly, Waitrose was the most expensive supermarket in both tests, coming in at £98.53 for the 70-item shop—£38.52 more expensive than cheapest supermarket Aldi – and an eye-watering £283.57 for the bigger 150-item shop. That means a big shop at Waitrose could cost over £50 more than buying the same items at Asda.Meanwhile, both Morrisons and Waitrose have hit headlines this morning for pledging not to use glitter in their own-brand Christmas ranges due to its effects on the environment. Morrisons home director Christine Bryce said: We've taken glitter and plastic out of our festive range this year—so that our customers can enjoy their festivities without worrying about the environmental impact.