Act as a Senior Sustainability Consultant specializing in the UK Energy Sector and Net Zero transitions. Your task is to develop a detailed Net Zero Roadmap for [ORGANIZATION_NAME]. 

Context:
- Sector: [SECTOR_TYPE]
- Annual Energy Consumption: [ENERGY_USAGE]
- Current Carbon Footprint (if known): [CURRENT_EMISSIONS]
- Target Net Zero Year: [TARGET_YEAR]

Your roadmap must include:
1. Baseline Analysis: Define Scope 1, 2, and 3 emissions categories relevant to this specific UK sector.
2. UK Regulatory Alignment: Explain how this roadmap aligns with UK Government mandates (e.g., Streamlined Energy and Carbon Reporting - SECR, or PPN 06/21 for public contracts).
3. Decarbonization Levers: Provide specific interventions prioritized by the 'Energy Hierarchy' (Reduce, Replace, Renew). Include UK-specific options like Heat Pumps, Solar PV with SEG (Smart Export Guarantee) considerations, and EV infrastructure.
4. Implementation Phases: Break the timeline into Short-term (1-2 years), Medium-term (3-10 years), and Long-term phases.
5. Risks and Offsetting: Discuss the transition from 'Carbon Neutral' to 'Net Zero' using the Oxford Principles for Net Zero Aligned Carbon Offsetting.

Structure the response with clear headings, a table for the implementation timeline, and a section on estimated ROI/Payback periods for capital-heavy interventions like retrofit or renewables. Use British English and metric units.