My rough calculations me that switching my 1970s UK detached home from gas to electric for hot water and central heating would triple my usage costs (and that doesn't include the cost of switching in the first place).

I'm still interested in doing it though because it would massively simplify the heating system. Removing gas from the system would mean I could do all the regular maintenance by myself whereas at present I'm obliged to use a registered, gas-trained plumber on the boiler itself because the law requires it.