The energy price cap for households on a standard variable tariff from 1 January to 31 March 2024 is £0.29 per kWh; at this price, a 100 kWh EV would cost £29 to charge from 0-100%.
Charging costs vary and this depends on a few things like your energy tariff and the type of charger you have.
You can have a home charge point installed for around £1,000 but can reduce that by up to £350 with the Zero Emission Vehicles grant. Or, ask about financing the installation cost.