Waitrose has ranked highly in previous surveys

The company scored 87% in the poll of 77 firms who were rated on convenience, customer service, experience, pricing and products.

John Lewis, which is owned by the same firm as Waitrose, came second, while JD Sports was at the bottom of the survey.

Which? said the best stores realised the "most important thing" to provide was well-informed staff.

"On the other hand, nothing alienates customers more than unfriendly, ignorant shop assistants, or even worse, not being able to find a member of staff when you need one."

John Lewis gained an overall score of 77% out of a possible 100% for maximum satisfaction.

JD Sports, which was given an overall customer satisfaction rate of 33%, scored 6% for customer service.

The poll by the consumer magazine was based on answers from nearly 11,000 people.

JJB Sports, Woolworths and Somerfield, all come low down in the table.