Using the figures in bold
The research figures are based on a person driving a Volkswagen ID.3 for 10k miles per year, which would cost £13.75/month when charging at home on a cheap night rate, compared to £91.75 per month on a public charge point at 50p per kWh, which is the typical rate for a DC rapid charger found at a service station or supermarket.
It would mean they are using 183.5kwh a month at 50p per Kwh
To get the £13.75, the economy tariff would have to be 7.5p per Kwh. EDF offer a 4.5p Kwh - so possible to meet those figures.
EDF