Mae’n wir dweud, fodd bynnag, bod pasio Deddf yr UE (Ymadael) wedi golygu bod darpariaethau a fyddai wedi bod o fewn cymhwysedd yn y lle cyntaf bellach heb fod o fewn cymhwysedd, gan olygu nad oes modd gweithredu Bil yr Alban nawr (hyd yn oed pe bai modd gwneud hynny ar yr adeg y cafodd ei basio gan y Senedd).
It is however the case that the intervention of the passing of the EU (Withdrawal) Act has meant that provisions which would have been in competence are no longer within competence, making the Scottish Bill inoperable now (even if it would not have been at the time it was passed by the Parliament).