For 2021 to 2022, the estimated amount is £20.0 million (2020 to 2021 £14.4 million) calculated on the basis of guidelines issued by the Office of Budgetary Responsibility.
Ar gyfer 2022 i 2023, yr amcangyfrif yw £24.2 miliwn (2021 i 2022 £20.0 miliwn) a gyfrifwyd ar sail canllawiau a gyhoeddwyd gan y Swyddfa Cyfrifoldeb Cyllidebol.