Serch hynny, mae'r broses o adael yn tynnu sylw at nifer o faterion hanfodol bwysig mewn perthynas â threfniadau cyfansoddiadol y Deyrnas Unedig a'r fframwaith gyfreithiol ar gyfer datganoli.
However, the process of withdrawal raises issues of profound importance in relation to the constitutional arrangements of the United Kingdom and the legal framework for devolution.