Serch hynny, mae cyfle i ddefnyddio deddfwriaeth Llywodraeth y DU wrth inni ymadael â’r UE i ddiwygio'r prosesau sylfaenol sy'n sail i gaffael. Mae Llywodraeth y DU wedi nodi ei chynigion yn ei Phapur Gwyrdd“Transforming Public Procurement”ac mae wedi cyflwyno'r opsiwn i Lywodraeth Cymru ddefnyddio deddfwriaeth San Steffan i ddiwygio'r prosesau hynny.
Nevertheless, there is an opportunity to use UK Government legislation as we leave the EU to reform the basic processes underpinning procurement. The UK Government has set out its proposals in the UK Government’s Green Paper“Transforming Public Procurement”and has presented Welsh Government with the option to use Westminster legislation to reform those processes.