Bydd y gweithgor yn gallu defnyddio'r dystiolaeth sylweddol ar ddiwygio a chyflawni'n effeithiol a ddatblygwyd dros y blynyddoedd diwethaf. Bydd felly yn canolbwyntio ar benderfynu beth i'w wneud mewn ymateb i'r dystiolaeth honno ac nid ar ddarparu tystiolaeth ychwanegol sylweddol ei hun.
The working group will be able to draw on the considerable evidence which has been developed over the last few years on reform and on effective delivery. The working group’s focus, therefore, will be on determining what should be done in response to that evidence and not generating significant additional evidence themselves.