Who implements Open Banking and who enforces it in the UK? Follow Naomi Last updated February 20, 2019 10:22 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? Is Open Banking safe? Is Open Banking only available in the UK? What is the difference between PSD2 and Open Banking? Where does TrueLayer come in terms of regulation? Comments 0 comments Article is closed for comments.