Have been a customer since April 2018, and due to some confusion over meter reads, I though I should check through my statements once it had been rectified. I discovered that I had been over-charged £158 over the past 10 months (“actual” not “estimated” meter reads). Still waiting for them to rectify, but have been told that they have had some issues with their automated billing systems. Recommend any existing customers to take a moment to calculate their usage and compare it to their bills, as this wasn’t obvious (we had to calculate standing charge and gas/electric unit cost to find the issue). Not very impressed and will be leaving once the contract is up.