The Government Says

Sovereign Grant Act 2011: report of the Royal Trustees on the Sovereign Grant 2026-27

Sovereign Grant Act 2011: report of the Royal Trustees on the Sovereign Grant 2026-27
Local copy of Sovereign_Grant_Act_2011_-_Report_of_the_Royal_Trustees_on_the_Sovereign_Grant_2026-27_.pdf

https://www.gov.uk/government/publications/sovereign-grant-act-2011-report-of-the-royal-trustees-on-the-sovereign-grant-2026-27

seen at 14:37, 24 March in Policy papers and consultations.