As CPTPP is a pre-existing trade agreement, negotiations would not begin with a clean sheet of paper: the UK would be required to join broadly on the existing terms.
Gan fod y CPTPP yn gytundeb masnach sy'n bodoli eisoes, ni fyddai'r trafodaethau'n dechrau gyda dalen lân: byddai gofyn i'r DU, i bob pwrpas, ymuno ar y telerau presennol.