Who implements Open Banking and who enforces it in the UK? Naomi June 18, 2019 08:14 Updated 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? Where does TrueLayer come in? What is the difference between PSD2 and Open Banking? Is Open Banking safe? Which UK banks for the Data API are we currently integrated with? Comments 0 comments Article is closed for comments.