Overview

• Which? priced a 75‑item basket at £127.92 at Aldi in August, with Lidl second at £128.35 or £128.30 with Lidl Plus, a gap of 43p at most.
• Waitrose was the costliest for the same basket at £172.61, equal to £44.69 or about 35% more than Aldi.
• Asda ranked third on the 75‑item shop at £139.42, while Tesco Clubcard shoppers paid £142.36 compared with £145.01 without the card.
• For a bigger 190‑item trolley, Asda was cheapest at £474.86, with Waitrose at £548.14, and Aldi and Lidl excluded from this comparison due to more limited ranges.
• Which? includes special‑offer and loyalty prices but excludes multibuys, and it says choosing the right retailer can cut grocery bills by up to around 35% or more than £500 a year.