There are a few 4x4 electric vehicles coming out (
https://www.fleetcarma.com/electric-pic ... ck-market/) and the mainstream manufacturers are all working on it, although battery life will be an issue for a couple of years yet. But that <<should>> solve the caravan and towing market. Maybe.
The UK consumed 47.1 billion litres of petrol/diesel in 2018. If you say petrol and diesel both contain the same amount of energy - 10kWh/litre (it's close enough for ***-packet calculations, but they don't), then that would equate to 471 billion kWh of new electricity required annually, in the new, green economy. Given the inefficiency of battery storage, it will need to be more than that, but never mind. If you pretend that the energy will be delivered evenly, 24 hours per day, then you need an extra 1.2 billion kWh per day. Sounds like a lot. A billion kWh is, I think, one TerraWatt hour (10¹² Watts), and the average nuclear power station puts out, let's say, 1,000 MWh, or one GigaWatt. You need 1,000 GigaWatts to make a TerraWatt, so the UK will need one thousand nuclear reactors, or equivalent solar/wind/wave installations, all running 24/7. No problem.
The above is just me thinking out loud, and I may have lost track of zeros, so feel free to put me right on the maths.