All my effort to reduce energy usage and cost has paid off. This morning I got a cheque from Scottish Power for =A3375 for overpayment of gas and electricity charges.
Ours is a large 4 bedroom 1990s house which I had cavity wall insulated and extra loft insulation added last year. We already had double glazing.
This together with reducing HW temperature slightly and replacing light bulbs (I know, I know) has had no appreciable reduction in comfort over the winter.
We have a gravity fed Gloworm boiler which is the same age as the house and gives no trouble, so I don't think it is cost effective to change the boiler.
What can I do now to further reduce the energy usage? Moving supplier will have lttle effect as I am already on a very good tarrif.