I have gas central heating and hot water, never use the immersion heater. No electric showers.
Just checked my electricity usage, average of 9.94 kWh per day over the last two years. That includes, cooker, kettle, fridge, freezer, tumble drier, toaster, Fan heater (occasional use) led lighting, power tools, tv etc. Two of us in the house.
Gas usage on hot water seems to be 1.43 m3 per day or 16 kWh per day. Given there is boiler efficiency to take in to account, that probably equates to about 13.5 kWh equivalent electricity usage. I do not have a smart gas meter so there may possibly be some central heating in this figure.