At the same time, it announced plans to transfer funding to the devolved governments in Wales and Scotland in expectation that they would establish new arrangements.
Ar yr un pryd, cyhoeddodd gynlluniau i drosglwyddo cyllid i'r llywodraethau datganoledig yng Nghymru a’r Alban, gan ddisgwyl y bydden nhw’n sefydlu trefniadau newydd.