Byddwn yn disgwyl i Ymchwiliad barhau am oddeutu pum mis. Byddai’n ystyried pob agwedd ar Brosiect yr M4, ynghyd â’r holl ddewisiadau eraill posibl.
I would expect an Inquiry to last around five months. It would examine all aspects of the M4 Project, as well as all suggested alternatives.