I would give a 0 if i could. The worst mistake I ever made was going with Ecotricity. I have called their call centres and emailed multiple times. Out of 6 months I have lived there for 7 weeks. In the last month (not living there) they billed me £818. This is despite me giving readings, having people come out to view, having previous confirmation that my bills were sorted after HUGE back and forth trying to sort out the original bill. They have randomnly now said it's £340. Through multiple queries i've now been told this is because I've 'paid an unusually small amount' and because they didn't have the start data reading so estimated it. This was brought to their attention in March so why it wasn't picked up then i have no idea. I have asked for data to back this up, and don't have that. The billing system is truly the worst and most incompetent i've ever come across. Cannot advise strongly enough to go nowhere near this company