My figures are only estimates, this will not work for everone and may not work when the new higher charges come in. Its more a lifestyle change.
At my partners house some vandals set fire to the (BT) box and the Internet went out, I did have some data but not unlimited. It was out for a month so i changed my sim only contact to unlimited. The speed most of the time was fast enough (I only have a 4 g phone if i updated my phone the 5g would be faster)
Gas and electric bill a proximity £200/month.
1, change your phone contract to a sim unlimited only £15/m on 3, there may be 2-3 phones in the house (we all cant have I phone 17, its a phone get over it.)
Saving £40 to £100
2, drop your internet package saving £40 to £50/m
All this is just cutting you outgoings without looking at your gas and electric bill.
Another way will cost money, buy an electric car with VTG.
Half you petrol/diesel when your car comes home and plugs in the lights come on in the house.
A Tesla power wall can cost £7000 for one or £14000 for 2. Your car battery is bigger and can be charged up at night at 7-10p/kilowatt.
I do expect some comments,
Yours, John