Complaints to the SIA: volume, timescales and trends
Local copy of sia-complaints-received.csv
Local copy of sia-complaints-resolved-timescales.csv
Local copy of sia-complaints-report-2023-2024.pdf
Local copy of sia-complaints-report-2024-2025.pdf
https://www.gov.uk/government/publications/complaints-to-the-sia-volume-timescales-and-trends
seen at 14:42, 12 May in Transparency and freedom of information releases.