How do you heat your house? Gas, electric, is the water heater an electric immersion heater, or heated by gas (combi boiler or in a cylinder)?
You seem to be using a lot of electric and gas overnight- what is switched on?
You can see the graph showing when you are using most- what are you doing then ?
These answers will help work out what you can do to economize.
In the meantime: reset the timer on your heating, 14 degrees overnight is fine, turn the thermostat to 18 max when you are sitting down in the evening. Less during the day while you are out/ busy.
Fluffy slippers, layers of clothes, a vest will keep you warm.
Heating is probably your biggest expense.
Dont waste hot water by leaving the tap running, or washing up each cup in a bowl full of water.
Make sure the washer is full loads only, cooler temperature and line dry/use a clothes horse. Dont use the dryer.
Batch cook- don’t heat the oven for just one thing, use a steamer for veg so you only use one ring. A slow cooker is useful too.
Eliminate drafts with door snakes , thick curtains, door curtains (add an extra set of lining to make curtains thicker).