Amazon Loses Bid to Block Two UK Antitrust Lawsuits Worth Up to £4 Billion

and June 2024. The complaint alleges that Amazon abused its dominant position by unfairly favoring its own retail products and its own logistics arm, Fulfilment by Amazon (FBA), in the Buy Box algorithm, pushing up costs and fees for independent sellers.

The second case, filed by consumer advocate Robert Hammond and supported by law firm Hagens Berman EMEA, seeks over £2 billion on behalf of an estimated 51.8 million eligible UK shoppers who allegedly paid inflated prices as a direct result of the same anticompetitive conduct.

Both cases were certified by the Competition Appeal Tribunal (CAT) on July 24, 2025, and proceed on an opt out basis, meaning eligible claimants are automatically included unless they actively choose to withdraw.

Amazon’s Appeal Blocked Following the CAT‘s certification, Amazon sought to challenge the ruling at the Court of Appeal, arguing that the economic analysis underpinning the lawsuits was fundamentally flawed…