Fake reviews for products sold on Amazon's Marketplace are being sold online "in bulk", according to Which?

The consumer group found 10 websites selling fake reviews from £5 each and incentivising positive reviews in exchange for payment or free products.

It suggested the firm was facing an "uphill struggle" against a "widespread fake reviews industry".

An Amazon spokesman said: "We remove fake reviews and take action against anyone involved in abuse."

The retail giant's Marketplace allows other retailers to sell their goods via the Amazon website.

(BBC)