At least here in the U.S., almost all gas consuming appliances (limited to cooking stoves your "hob", I think) heating furnaces and hot water heaters require some electrical input for them to work. It's rare to find, for example, the older flame type pilot lights... they're nearly all electrically started when the knob is turned on. Same with the furnaces and hot water heaters. Most home heating units using forced air require electrical power for the distribution fan and thermostat functions.
Thing is, here, at least, probably 65% to 70% of our electricity is produced by coal burning power plants. We have (especially here in the intemountain western U.S.) over 500 years supply of high quality, low sulphur coal deposits that easily mined, hencea fairly low cost fuel. But environmentalists don't like it and the current administration is sympathetic to the voles, hence new regulations for even cleaner burning plants (for which new technology doesn't exist) are being required.
So... long way of saying our heretofore 'cheap' electricity is about to take a significant hike (unless we're able to change the administration in 2 years). But... we also have an overabundance of natural gas and therefore inexpensive. If we can keep the tree-huggers away from that source it will provide relatively cheap source of electrcity as well... it's just going to ake years to convert to that technology.
If I were to build a new home or retrofit an existing all electric home, I'd look closely at the savings to switch to natural gas. I think the savings would be remarkable... all due to our supply of the fuel which may not be available in the U.K.