Act as a Lead Solutions Architect and Bid Consultant specializing in UK Government Procurement (Crown Commercial Service frameworks). Your task is to draft a comprehensive 'AI Transition Plan' for the following project: [PROJECT_TITLE].

Contextual Background:
- Department/Agency: [GOVERNMENT_DEPARTMENT]
- Current Legacy State: [CURRENT_STATE]
- Proposed AI Solution: [AI_SOLUTION_OVERVIEW]
- Target Framework: [CCS_FRAMEWORK_NAME]

Please structure the plan with the following sections:

1. Executive Summary: High-level vision align with the UK National AI Strategy.
2. Technical Integration Map: How the AI will interface with [EXISTING_INFRASTRUCTURE]. Detail the move from Alpha to Beta phases.
3. Governance & Compliance: Specific adherence to the CDDO Algorithmic Transparency Recording Standard and the Data Protection Act 2018 (UK GDPR).
4. Ethical Framework: Address bias mitigation, human-in-the-loop requirements, and explainability (XAI) as per the Central Digital and Data Office guidelines.
5. Skills & Upskilling: A plan for transitioning civil service staff to work alongside the new AI tools.
6. Risk Mitigation: Detailed table of risks (Technical, Operational, Ethical) and specific UK-context mitigations.
7. Timeline: A phased rollout aligned with GDS Service Assessment milestones.

Constraint: Use British English. Ensure the tone is professional, authoritative, and focuses on 'Value for Money' (VfM) and 'Social Value' as defined in PPN 06/20.