My 1930’s semi with solid walls costs £165 per month in gas+electric with npower. I know this is bang on for our use as I’ve been taking readings once a month since we bought the place a year ago. Done a price check using uSwitch with accurate numbers and npower still coming out cheapest as well.
Gas is the culprit in our case, costing £120 per month, boiler is 25 years old and it’d be more efficient to burn £50 notes in it. Thankfully, it’s being replaced at the end of the month.
Not a lot more we can do about it. Loft and floors insulated as best can be, double glazed, efficient bulbs all round, heating used as sensibly as you can with two very young children in the house, wife in all day, and me working at home a lot.
Will be interested to see what the bills are like once the new boiler and fancy heating controls are in, along with a few new rads.