We've now switched off our central heating and only switch on the hot water (boiler with tank, not combi) for about half an hour a day. Just enough for a shower. Will occasionally treat ourselves to longer so that we can have a bath (sharing the water). So at least for gas, our usage is minimal. That will of course change in winter 
But I can't seem to reduce our electricity usage to below 8-10kwh per day - which still adds up to c£5 a day, even now in the summer!
We're now careful to only boil enough water for the pot of tea, put the dishwasher on eco (which takes 4.5 hours
) overnight on average every 2nd day (usually only 2 of us in the house), 2 washing machine loads a week, one light on in the living room in the evening....
I can see why people are shit scared of their future energy bills 