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Tesco voted UK's worst supermarket
Tesco has been voted the worst supermarket and Waitrose the best in an annual poll of 11,000 consumers by watchdog Which?
Waitrose received a customer score of 82%, including five-star ratings for its customer service and the quality of its fresh produce.
Tesco was at the bottom of the table of the nine major supermarkets, scoring just 45% and receiving poor marks for its pricing, store environment, quality of fresh produce and customer service.
More than 11,000 Which? members rated the supermarkets with scores based on customer satisfaction and the likelihood they would recommend it to a friend.
Discount supermarkets Aldi and Lidl came second and third with scores of 74% and 69% respectively, beating some of their bigger rivals such as Morrisons (59%), Sainsbury's (58%) and Asda (53%).
Aldi and Lidl were the only supermarkets to get four-star ratings for their pricing, with 97% of Which? members saying they both offer good value. Fourth place went to Marks & Spencer with 68%, while The Co-operative scored just above Tesco with 48%.
Ocado took top spot in the online ranking with 81%, followed by Waitrose (74%), Sainsbury's (71%), Tesco (63%) and Asda (61%).
The poll revealed that consumers' biggest irritation when supermarket shopping is not being able to compare prices because of different unit measurements, with 37% reporting that this annoyed them. Members also wanted supermarkets to keep special offers simple, with 55% preferring straight discounts ahead of other offers such as petrol vouchers (16%) or buy-one-get-one-free deals (11%).
Which? executive director Richard Lloyd said: "Which? research shows that rising food prices are one of consumers' top financial worries, so in these tough economic times it's understandable that supermarkets scoring well for value for money are being ranked so highly in our league table.
"But our survey also found that consumers think supermarkets are not doing enough to help shoppers on tight budgets, with only one in five Which? members saying they trust retailers to charge a fair price for food."