Medical clinics are using fake Google reviews to boost their profiles online, a BBC investigation has found.
Consumer groups say fake reviews are a “significant and persistent problem” and have called on internet firms to do more to remove them and fine companies.
Which? has warned it could be a serious issue if someone chooses a treatment clinic based on reading a fake review.
The government said it was toughening the law to protect consumers, while Google said it removed fake reviews.
Fake reviews can be bought online and have been known to appear on Amazon, Trustpilot and the App Store.