I'm probably not answering the right questions but i) there is not a single UK Car manufacturer, they're all foreign owned and they're taking their money elsewhere & ii) too late on the electrification next generation, most of the future winners are 5-7 years into development. Some big players have missed the boat and new battery companies will step into the gaps.
The company I work for is releasing 2025 technology & the car companies are all shortening vehicle model life from 7 years to 3 years. BMWs new software releases are changing from 3 per year to monthly & they have cancelled a vehicle launch as it has already been superseded by a rivals technology.