@OhPeeQueue
I don't quite know how to say this, and feel a bit bad about it as some people have atrociously high energy bills, but for our GAS, we pay £35 a month direct debit... (Upped it from £30 to £35 some 8 months ago as we were £17 in the red,) and when I sent our reading through 2 days ago, we were £43 in credit.
We are quite frugal, and never have the heating on higher than 18, even in winter, and we have a boiler (and pump) that are less than 10 years old. We live in a modest sized (not tiny, not huge) 3 bed bungalow, so the heat doesn't fly through the roof. But we are in quite a bit (I work from home, and DH works 4 days a week.)
So I am a little surprised that our gas bill (cooker and heating) is slightly under £35 a month, and I am gobsmacked at the gas bills on here running into the £150 a month region. Our electric is on a £50 direct debit a month by the way, and we are currently £39 in credit...
All I can think of (with some of the people going from £45 a month to £150 or more,) is that they switched to a new energy company who enticed them with an artificial/misleading low offer, to get them to change, and their energy company has shut down, and their new energy company has adjusted them to what their monthly payment should be.
We have been with British Gas for several decades, and as I say, we pay less than £85 for both gas and electric combined.