Shoppers at supermarkets such as Tesco, Asda and Aldi have found themselves divided over an unspoken "rule" that allows people to jump the queue.
Some customers say they're happy to follow it, while others are less convinced. The so-called rule apparently states shoppers with a full trolley should let others with just a few items go ahead of them.
While many say they would let someone go before them if they didn't have much, others say they should "wait their turn". A number of those discussing the topic said it it depends on their circumstances.