RE: Domestic electric supply for EV users
Ovo has great customer service and competitive prices. Their mix is fairly green but Ovo doesn't invest in building any generation. They buy from others.
For us M&S energy were the least expensive, with Ovo close behind and Ecotricity in a surprising 3rd place.
The annual difference Between M&S and Ecotricity was all of £70, so I've switched from Ovo to Ecotricity.