Occasionally, not always depends on the amount, one such time was two years ago at Christmas, me, my daughter and a friend save £10 a week from October to spend on all things Christmas food and drinks wise at M&S , on such time the bill was £184 and we felt the usually lovely Turkey crown wasn’t as nice and was rather small, I emailed them to ask had they changed suppliers,I didn’t get an answer till January due to the office being closed for the holidays,however I got one asking if we still had the receipt, my daughter did as she kept it to show my friend in particular how much stuff was, I was told to take it to the store and get a refund, they refunded the whole amount despite my protesting it was just the Turkey crown