By Nick Carey LONDON (Reuters) – Luxury British carmaker Bentley said on Wednesday it would start production of its first fully-electric car in 2025, a significant milestone in the Volkswagen AG unit’s planned shift to a fully-electric model line-up by 2030. Bentley also committed to investing 2.5 billion pounds ($3.4 billion) in sustainability over the next decade. The carmaker said it would reconfigure its UK plant in Crewe to build the new vehicle. It did not provide further details on what form its first fully-electric vehicle will take. Across the auto industry, major manufacturers have b…