Core Viewpoint - Amazon has lost its attempt to dismiss two large-scale lawsuits totaling £4 billion ($5.41 billion) due to allegations of abusing its dominant market position [1][4]. Group 1: Lawsuit Details - The lawsuits include one filed by competition law scholar Andreas Stephan on behalf of over 200,000 third-party retailers, valued at £2.7 billion [1][4]. - The allegations claim that Amazon manipulates the "Buy Box" feature on its website to benefit itself and favors products using its own logistics and delivery network [1][4]. - A second lawsuit, valued at £1.3 billion, was filed by consumer rights advocate Robert Hammond on behalf of millions of Amazon customers, also accusing Amazon of similar abuses of market power [1][4]. Group 2: Legal Proceedings - Amazon previously stated that these allegations are baseless and argued that the cases should not be certified as part of the litigation process due to flaws in the economic methods used to prove the claims [1][4]. - The Competition Appeal Tribunal certified the two cases last year, meaning that members of the claim group will be part of the case unless they opt out [1][4]. - Amazon's request to appeal this decision was rejected by the appeals court [2][5].