Who implements Open Banking and who enforces it in the UK? Naomi May 10, 2020 19:00 Follow A public entity called the Open Banking Implementation Entity has been tasked with implementing the CMA (Competition & Markets Authority) order. The CMA enforces it. More information can be found on the Open Banking Implementation Entity page and CMA. Related articles How does Open Banking provide more choice for consumers? What is the difference between PSD2 and Open Banking? Is Open Banking only available in the UK? Where does TrueLayer come in terms of regulation? Is Open Banking safe?