E-On but that doesn't matter.
I have a fridge freezer too but they literally use nothing once they are down to the temp and I have mine both on coldest settings possible.
I do however have the most energy efficient devices wherever possible.
All my lights are led, I have a new modern gas central heating pump the old one used 200w the new one only 40w. All showers are gas central heating. All heating is gas too. I have an electric oven, air fryer, microwave, coffee machine, kettle, baby prep machine, dishwasher, washer and a dryer, etc basically everything and more.
I have a ton of gadgets. I have 6 screens, 3 laptops, 4 tablets, 2 phone, etc.
What uses most amount of electric is old inefficient devices and heating air or water. Heating air or water includes things like tumble dryers, kettle, hair dryer, dishwasher, etc. Electric showers are a killer as is kettles and hair dryers.
Running a fridge freezer for a day is probably equivalent to boiling a full kettle for instance. That's how expensive it is to heat air or water. Washers, tumble dryers and dishwasher are big consumers too. It's why we before the wee man was born air dried all our clothes I actually gave my tumble dryer away for free on gumtree. Bought a new one 4 years later when the wee man was born.