Aldi has been crowned the cheapest supermarket of 2023, beating its rival Lidl, according to consumer group Which?. The supermarket was ranked as the cheapest for 11 months last year, missing out to Lidl in October. Which? research found a basket of 43 groceries was £74.83 at Aldi in December, narrowly beating Lidl, where it cost £76.74. Waitrose came in nearly £20 more expensive than Aldi last month at £94.94, and Which? found it was the most expensive supermarket each month of 2023. The consumer group also compared the cost of a larger trolley of more than 100 items including more branded pr…