Question to the HM Treasury:
To ask Her Majesty's Government whether data is available on how the Sovereign Grant is spent; and if so, where that data is available.
Each year the Royal Household publishes the Sovereign Grant and Sovereign Grant Reserve Annual Report and Accounts, a full report on Royal public finances. The 2018-19 report was published on 25th June 2019, and can be found on the Monarchy website [1].
[1] https://www.royal.uk/sites/default/files/media/final_sovereign_grant_for_website.pdf