The Competition and Markets Authority (CMA) has announced a clampdown on misleading supermarket promotions.

Its decision was a response to a “super-complaint” by Which? on 21 April 2015, raising concerns about confusing and misleading promotions and a lack of easily comparable prices because of the limitations of unit pricing.

CMA said its investigation found examples of pricing and promotional practices that have the potential to confuse or mislead consumers and which could be in breach of consumer law. However, it concluded that these problems were not occurring in large numbers across the whole sector and that generally retailers were taking compliance seriously to avoid such problems occurring. The CMA also found that more could be done to reduce the complexity in unit pricing to make it a more useful comparison tool for consumers.

In its work following up on the investigation the CMA will work with businesses to cut out promotional practices which could mislead consumers. This includes the practice of running ‘was/now’ promotions where the discount price is advertised as a promotion for longer than the higher price applied.

To improve compliance the CMA also recommends that, in its ongoing review of the ‘Pricing Practices Guide’, the Chartered Trading Standards Institute clarifies how the legislation applies to certain promotional practices.

The CMA also recommends that the Department for Business, Innovation and Skills (BIS) publishes best practice guidelines on the legibility of unit prices, and looks at ways to simplify and clarify legislation, including how the law requires items to be unit-priced when they are on promotion. The CMA has also published ‘at-a-glance’ guidance to help consumers make better use of unit pricing.

Nisha Arora, CMA senior director, consumer, said: “We welcomed the super-complaint, which presented us with information that demanded closer inspection. We have gathered and examined a great deal of further evidence over the past three months and are now announcing what further action we are taking and recommending others to take.

“We have found that, while supermarkets want to comply with the law and shoppers enjoy a wide range of choices, with an estimated 40% of grocery spending being on items on promotion, there are still areas of poor practice that could confuse or mislead shoppers. So we are recommending further action to improve compliance and ensure that shoppers have clear, accurate information.”