To give you some scale of the electricity generation problem, I read today that it would need 50 more Nuclear power stations and 2 more Sellafields (to reprocess the spent fuel), to cope. So that is 50 x £13B + 2 x £30B.
This won't happen, so I bet incentives for using fuel cells at home.
Li supplies will get difficult in 30 years time, as well as the widespread polution extraction causes to the water systems.
There will need to be large scale Li battery re-processing plants. What will we do with all the petrol stations?
The inland revenue will have a massive black hole from all the fuel taxes, so expect to be taxed in another way, probably new car tax and some sort of annual tax increase.