Not sure if this has been posted before but thought I'd share an energy supplier that I've actually had a pleasant experience with!
They're called Bulb; they're green and around 15-20% cheaper than my previously quite cheap Sainsbury's Energy tariff. I pay around £85/month for 3 people living in a 1,800sq ft Victorian terraced house (gas and electricity).
The switching process was seamless, and they deal with closing current supplier's account.
If you use this link to get started we both get £50 credit too https://bulb.co.uk/refer/robin359
PS, I'm genuinely not affiliated with them!