A survey claims that Sainsbury's is 'the cheapest supermarket' but people have noticed this crucial flaw

A study by consumer group Which? has supposedly shown that Sainsbury's is the cheapest supermarket - but all is not as it seems.

If you're surprised (or sceptical) about this, you're not alone.

The study, which was reported by the BBC, has angered readers who spotted a bit of a problem with its results: it only factored in supermarkets which sell online.

This means that Aldi and Lidl - which most people would assume to be the cheapest supermarkets - were not included in the research, which compared prices for products such as toilet paper and cereal, but only based on their website listings.

Sainsbury's still beat Asda, Tesco and Morrison's, which isn't bad going, but people were still pretty outraged by what they consider to be flawed data.

Some viewed it as elitist to exclude the two supermarkets that they claim best cater to low-income people.

Others just wanted to share their love for Aldi and Lidl, which we're very much here for.