Yeah well I'm in a grossly underoccupied 4 bedroom house.
The November electricity bill is £66.57, which is only £10 more than you.
The gas situation is all debateable - the person on the top floor is going on holiday for 2 months, so maybe I shut their thermostatic radiator valves down to 3 or even 2.
These nerdy central heating type on youtube seem to say that cutting out heat on some rooms results in heat leakage from the ones in use.
I console myself with the thought that a shared ownership retirement pad in Vauxhall would have combined rent/service charges of £1,000 per month apparently.
So being ripped off by Octopus for 4 or 5 months a year is probably preferable for me at the moment.