I thought I read ages ago if you had just one halogen down-lighter on 24 x 365 it would cost £34. May well be wrong but my electricity usage has gone down enormously over the past few years by swapping my 25 or so down-lighters for LEDs, and similar changes. Try boiling as much water as you need in the kettle rather than twice as much, that's and easy one!
In 2012 I spent £717 on electricity (5110 units)
In 2019 I spent £539 (5103 units)
The difference being I am charging my car in the 2019 figures, so saving on petrol, which i reckon would have been about 1500 units (very roughly 4000 miles worth, say 100 gallons say £500 petrol saved)
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