We've had a calor gas central heating boiler for about 25 years, the Calor gas has got very expensive. In the last two years, in the worst period in the Winter it cost £46 per week for heating and cooking. Over the year it cost £3.09 per day for heating/lighting/cooking (plus electricity)
The latter part of the Summer we removed the boiler and gas cooker, replaced them with Oil filled radiators/fan heaters/convector heaters for use in rooms as required. Hot water supplied by instant water heaters (so no tank of water to keep hot when not being used). New electric cooker (my wife never did like gas). Cost of Electrical modifications (new consumer unit, instant water heater, cooker, wiring etc.) about £1000, replacing the gas boiler would have been considerably more.
Our cost comparison over the last three months is:-
Gas costs @ £46 x 13 weeks = £598 (plus electricity)
Electricity costs £382.39 less £22.95 direct debit discount = £359.44 plus vat @ 5% = £377.41, a considerable saving.