looking at some numbers I saw above...
20 Nov 2018 - 31 Dec 2018
Standard energy 1605.kWh at 16.97p £272.36
That's a usage of about 41 kWh/day
01 Jan 2019 - 18 Feb 2019
Standard energy 1871.kWh at 15.76p £294.87
That's electricity, at a usage of about 48 kWh/day
We will assume that these are actual, not estimated figures. Have you checked them?
I think that you have some electric heaters running.
Might be in a bedroom, might be in a shed, might be in the garage of loft. That's a lot of energy so you would notice the heat.
If you want, you can go and stand by your electricity meter and observe how fast the red light flashes (or how fast the disk spins, if you have one)
Then look at your consumer unit. You will probably have some MCB for sockets. Tourn one of them off. Does the meter speed change? Then another. Until you've turned them all off. The meter should now stop.
It won't be lights (unless you have an array of halogen downlighters), nor will it be computers, TV or phone chargers. Have you got a hot-water cylinder with an electric immersion heater in it? or a swimming pool?