The Welsh Government, in line with its formal Accounting Officer responsibility takes a final decision on how UK Government underspends relating to city and regional growth deals are treated.
Mae'r Swyddfa Cyfrifoldeb Cyllidebol yn cynhyrchu rhagolygon Treth Trafodiadau Tir i gyd-fynd â chyllidebau Llywodraeth Cymru a Llywodraeth y Deyrnas Unedig.