So currently we have a semi detached house with a converted loft, solid brick walls, a possible cavity wall extension and electric storage heaters and immersion heater on economy 10. electric bills are high and so although the storage heaters can make the house nice and warm I rarely turn them on to save money. want to make the house warmer, fuel costs lower and ideally future proof and more attractive to future buyers. planning on staying at least 3 years.
I have around 2 grand to spend - what's the best thing I could spend it on to make the most difference? ?