Roeddwn am roi gwybod i Aelodau’r Cynulliad bod y mater wedi’i ystyried ac mai dau opsiwn ymarferol sydd bellach. Byddai’r cyntaf yn golygu sefydlu comisiwn annibynnol yng Nghymru i lunio rhagolygon ar gyfer refeniw trethi datganoledig; byddai’r ail yn golygu defnyddio corff sy'n bodoli eisoes i gyflawni'r swyddogaeth hon. O ran yr ail opsiwn, rwyf wrthi'n trafod gyda Llywodraeth y DU y posibilrwydd y gallai'r Swyddfa Cyfrifoldeb Cyllidebol wneud y gwaith hwn.
I wanted to report to Assembly Members that consideration has narrowed the field to two feasible options. The first would involve setting up an independent commission in Wales to produce forecasts for devolved tax revenues; the second would use an existing body to carry out this function.  In relation to the latter option, I am in discussions with the UK Government about the feasibility of the Office for Budget Responsibility undertaking this work.