Prif ddiben y Gyllideb Atodol hon yw adlewyrchu'r  newidiadau cyllidebol ers Gyllideb  Derfynol 2021-22 a gyhoeddwyd gan Lywodraeth Cymru ym mis Mawrth.
The main purpose of this Supplementary Budget is to reflect the budgetary changes since the Final Budget 2021-22 published by the Welsh Government in March.