I'm using between 17-20 per day as well. I have no idea what to do, I've changed all the lights to LED's, and I've turned off the immersion heater in the water tank. i've gone through my house with a fine-toothed comb and cut out and switched off all my vampire devices. I must have reduced my usage by at least 2-3kwn per day, but my smart meter is still saying I'm using exactly the same as before as if I've done nothing!! I'm going to watch it for another week and if it doesn't fall then I'm calling EDF as they could be ripping me off, laying about my usage or the smart reader is reading wrongly