How the costs mount up...

These are average costs, per year, per household according to the energy saving Trust. ÷ TV (plasma flatscreen) — £85.54 ÷ Fridge-freezer — £55.51 ÷ Cooker (with an electric hob) — £41.21 ÷ Desktop computer — £21.58 ÷ House alarm — £8.71 ÷ Microwave — £7.28 ÷ Iron — £4.03 ÷ Coffee machine — £4.13 ÷ Hair dryer — £2.60 ÷ Doorbell — £6.76 ÷ Internet router — £7.54