Roedd yr adolygiad manwl, a gyhoeddwyd ymmis Hydref eleni, yn cynnwys grŵp craidd bach o arbenigwyr o fewn y sector a'r tu allan iddo i ddarparu mewnbwn ac i herio.
The deep dive,announced in Octoberthis year, involved a small core group of experts from both within the sector and outside to provide input and challenge.