TikTok and Temu have pulled cheap electric heaters from their online stores after it found they could explode or start house fires.
The consumer group tested eight heaters, the cheapest of which was just over £7, and found most did not meet UK safety standards.
It said the devices, some of which had been promoted by influencers on TikTok, posed “a serious safety risk” to users.
TikTok and Temu both said customer safety was their priority.
However, despite both companies removing the items from sale, it said it had found that more similar listings had since appeared in their place.
Temu and TikTok, through its Shop platform, have emerged as rivals to more established online marketplaces such as Amazon and eBay, with millions of UK shoppers turning to them for seemingly affordable products.