Act as an expert UK Renewable Energy Consultant and Electrical Project Manager. Your task is to write a comprehensive 'EV Charging Installation Proposal' for [CLIENT_NAME] regarding their site at [SITE_LOCATION].

Structure the proposal with the following sections:
1. Executive Summary: Highlighting the benefits of the [CHARGER_MODEL] and the transition to electric transport.
2. Site Assessment: Detail the technical requirements for [SITE_TYPE] (e.g., residential/commercial), addressing the current electrical capacity and any required upgrades such as [ELECTRICAL_UPGRADES].
3. Technical Specification: Detailed breakdown of the [CHARGER_MODEL], including kW output, tethered/untethered options, and smart features.
4. Compliance and Safety: Explicitly reference BS 7671:2018+A2:2022 (18th Edition) and the 'Electric Vehicles (Smart Charge Points) Regulations 2021'.
5. Financial Breakdown: Itemized costs for hardware, labor, and OZEV grant eligibility (state if the [GRANT_TYPE] applies).
6. Project Timeline: Estimated phases from DNO application to final commissioning.

Tone: Professional, authoritative, and persuasive.
Currency: GBP (£).
Specific constraints: Use British English spelling and ensure all safety standards mentioned are specific to the UK.