Roedd y Comisiwn ar Ddatganoli yng Nghymru (Comisiwn Silk), a sefydlwyd gan Lywodraeth y DU ac a gyflwynodd ei adroddiad yn 2014 ac, yn fwy diweddar, yComisiwn Annibynnol ar Ddyfodol Cyfansoddiadol Cymru, ill dau o blaid datganoli plismona.
The Commission on Devolution in Wales (theSilk Commission), which was set up by the UK Government, which reported in 2014 and, more recently theIndependent Commission on the Constitutional Future of Wales, both supported the devolution of policing.