The UK Civil Service rolled out “One Big Thing” (October 2025 – February 2026), a mandatory training initiative to help all civil servants understand and use AI safely and responsibly. The AI Playbook was issued with practical guidance on using AI tools in government work, including dedicated pathways for senior civil servants. However, the Public Sector AI Adoption Index 2026 reveals significant implementation gaps: 54% of civil servants report receiving no AI training, 44% say training feels like an afterthought, and the UK ranks 6th of 10 countries in public sector AI adoption overall (47/100), with the lowest score on embedding (42/100) — meaning AI is rarely integrated into everyday workflows. The index also reports that a third of UK civil servants use AI without guidance, classified as “shadow AI.”
Who it affects: All UK civil servants; government departments and policy delivery functions that depend on civil service capability.
What is notably missing: No binding standard for AI competency exists for civil servants. Training delivery was voluntary in many departments; no enforcement mechanism requires completion. Short, practical, role-tailored training is reported as effective, yet the programme did not provide this level of customization at scale. No accountability for departments that reported zero training completion. Ethics education was not emphasized; the focus was practical tool use. No requirement that civil servants understand algorithmic bias or can critically evaluate AI systems — only that they use them “safely.”