Sources: UK's competition watchdog is planning a formal investigation into Amazon, mirroring the EU probe, over how it uses the data it collects
Context & Ripple Effects
This lands mid-arc: the European Commission opened its formal probe into Amazon's dual role as marketplace and retailer back in July 2019, and by mid-2020 was preparing formal charges specifically over Amazon scooping up third-party sellers' data to compete against them (per WSJ-sourced reporting). The UK watchdog now appears ready to replicate that line of inquiry on its own side of the Channel.
It also extends a pattern at the CMA itself: just months earlier it was reportedly preparing an antitrust investigation into Facebook's use of customer data to squash rivals, so an Amazon data probe would make platform-data abuse the agency's defining case load. The later [[a:980539|CMA investigation into whether Amazon favors its own retail business and Prime-using sellers]] suggests the planned probe did mature into formal action.
First-order effects
- Amazon would face parallel UK and EU investigations examining the same conduct — harvesting marketplace data from independent sellers — forcing it to run two legal defenses with potentially divergent remedies.
- Third-party sellers on Amazon's UK marketplace become the implicit beneficiaries, since the probe's core allegation is precisely the practice that disadvantages them.
Second-order effects
- A confirmed CMA probe alongside the Facebook case signals to every large integrated platform operating in Britain that data-use practices are the regulator's priority target, not pricing alone.
- If the UK follows the EU's evidentiary lead, other marketplaces with first-party retail operations could face scrutiny of the same hybrid model rather than being treated as neutral venues.
Third-order effects
- Post-Brexit, the CMA mirroring the Commission shows UK competition policy tracking EU digital-market doctrine rather than diverging — meaning platforms face substantively aligned regimes across both jurisdictions.
- Sustained pressure on the dual-role model points toward structural questions regulators have historically avoided: whether marketplace operators should be separated from competing as retailers on their own shelves.
The trend: Competition authorities in Europe are converging on data-use and self-preferencing by vertically integrated platforms as the central antitrust question, with the CMA following the EU's playbook case by case.