Act as a Senior Sustainability Consultant specializing in the UK Transportation and Logistics sector. Your task is to develop a comprehensive investment pitch for [COMPANY_NAME] to transition their fleet of [FLEET_SIZE] [VEHICLE_TYPES] to zero-emission alternatives.

Contextual Constraints:
- Focus on the UK market, specifically addressing the 2030/2035 phase-out of petrol/diesel HGVs and vans.
- Consider [GEOGRAPHIC_SCOPE] (e.g., London ULEZ, national long-haul, or regional last-mile).
- Target Audience: [TARGET_AUDIENCE] (e.g., Board of Directors, Private Equity Investors, or Local Authority).

Please structure the pitch with the following sections:
1. Executive Summary: The high-level value proposition including the 'Why Now?' factor.
2. Regulatory Landscape: Impact of UK Net Zero strategy, Clean Air Zones (CAZ), and potential carbon taxes.
3. Operational Analysis: Comparison of Total Cost of Ownership (TCO) between current ICE vehicles and [PREFERRED_TECH] (EV/Hydrogen).
4. Infrastructure Strategy: Recommendations for depot charging, on-the-road charging, or hydrogen refueling hubs.
5. Financial Incentives: Mention the Plug-in Van/Truck Grant and capital allowances like Super-deduction or Full Expensing.
6. Risk Mitigation: Addressing range anxiety, grid capacity, and residual value of assets.
7. Roadmap: A 3-5 year phased implementation timeline.

Tone: [TONE_STYLE] (e.g., Analytical and data-heavy, or Visionary and inspiring).

Key Data Points to Include: Ensure you reference the 'UK Transport Decarbonisation Plan' and provide a mock ROI calculation based on current UK energy prices vs. diesel costs.