UK cheapest supermarket announced as it's praised for 'great value'The latest price comparison from Which? has revealed the cheapest supermarket in the UKView Image Some major supermarkets have been hailed Britain's cheapest (Image: Getty Images)A popular supermarket has once again been named the UK's cheapest in the latest price comparison by Which?. compares the average price of a shop consisting of popular groceries at the eight largest supermarkets. ‌Tesco secured third place, with the average bill for Clubcard members amounting to £135.64, while without a Clubcard, the Tesco shop cost £138.66. Retail Editor, said: "Aldi is the UK's cheapest supermarket again this month, according to our latest price analysis, showing that it continues to represent great value without the need for two-tiered pricing.