Since then, more than 113,000 people have signed our petition urging supermarkets to take action - and, as a result, two major supermarkets have committed to stocking budget ranges in their smaller convenience stores.
The Competition and Markets Authority (CMA), which is the regulator for the grocery sector, has also told supermarkets to make prices clearer. And the government has promised to revamp the rules around unit pricing.
undefinedSupermarkets act on budget groceries
Our campaign called for supermarkets to stock budget-range groceries across all stores, but particularly in areas where people most need support.
We called on Which? supporters to help check exactly where budget groceries were available - and they helped in their hundreds. They also fired off thousands of targeted tweets to pressure the supermarkets to act.
It led to Morrisons committing to stock up to 40 budget grocery items in 500 of its smaller Morrisons Daily stores.
Sainsbury's followed suit, announcing it would stock up to 18 budget-range items in about 200 of its Sainsbury's Local stores.
Tesco also pledged to stock 50 cheaper groceries than before in its smaller Express stores, although these aren't all from its cheapest budget range.
As you can see from this video, though, much more still needs to be done.
Government acts on unit pricing
Our campaign called for clear, fair and transparent pricing so shoppers could more easily compare value.
It called on the government to reform unit pricing legislation and wrote to retailers not fully complying with the law asking them to make changes or risk enforcement action. It said because of issues with unit pricing compliance, as well as the rules themselves, shoppers may be finding it hard to spot and compare the best deals.
Tesco Clubcard Price promotions still don't show unit pricing, despite a commitment from the grocer back in July that it would start doing so in early 2024.
The CMA also highlighted that not all shoppers are able to benefit fully from strong competition, particularly those who cannot travel to large stores or shop online and, therefore, may rely on higher-priced convenience stores.
Now plans to reform the Price Marking Order, which governs the rules, are being drawn up by the Government.
Which supermarkets need to do more?
There's still more to be done, and Which? will continue to put pressure on the supermarkets that haven't gone far enough.
Our latest research shows that 78% of adults in the UK are taking actions to reduce how much they spend on food as a result of increased food prices and the cost of living crisis.
The most common changes are looking out for food on promotion, buying more own-label budget-range items and trading down to cheaper alternatives.
Alarmingly, almost one in six (16%) said their household was skipping meals.
Clearly, this means there's still more to be done. In particular, we want to see:
Sue Davies, Which? head of food policy, said: 'Ministers vowing to make food and drink pricing clearer is a huge win at a time when millions have struggled to afford basic food. This should make it a lot easier to assess what's best value across the board.
'As a result of our campaign, two supermarkets have committed to helping people who rely on convenience stores by increasing the availability of budget ranges in these stores, but there's still a lot more to be done.'
Find out more:What about loyalty pricing?
The CMA has also launched an investigation into supermarket loyalty pricing (for example, Sainsbury's Nectar and Tesco Clubcard prices, which give loyalty scheme members access to lower prices than are available to non-members).
Our research found instances where supermarkets' loyalty offers could have given shoppers the impression that savings were more substantial than they really were.
The regulator's investigation will look at how the growth in loyalty pricing is affecting consumers and competition in the groceries sector.
Do you want to see your supermarket take action?source https://www.which.co.uk/news/article/which-campaign-brings-clearer-food-pricing-and-more-budget-groceries-aTPdN4q6ZCEl