The Government Says

Standard Determinate Sentence (SDS40) release data: October 2024 to December 2025

Standard Determinate Sentence (SDS40) release data: October 2024 to December 2025
Local copy of Standard_Determinate_Sentences__SDS40__release_data__England_and_Wales.pdf
Local copy of SDS40-data-Oct-to-Dec-2025.ods

https://www.gov.uk/government/publications/standard-determinate-sentence-sds40-release-data-october-2024-to-december-2025

seen at 09:43, 30 April in Transparency and freedom of information releases.