Amazon has promised to work harder to tackle fake reviews on its site following an investigation by the competition watchdog.

The retail giant has committed to “robust processes” to quickly detect and remove fake reviews alongside sanctions for rogue sellers and businesses as part of work by the Competition and Markets Authority (CMA) to curb the customer hazard.

Amazon has also promised to tackle concerns around “catalogue abuse”, where sellers hijack the reviews of well-performing products and add them to an entirely separate and different product in order to falsely boost the star rating.

In practice, this could mean a consumer thinks they have found a pair of five-star headphones when the majority of reviews are for an unrelated item.

Amazon has agreed to sanction businesses that

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