Power use and Heat

Central heating in towns and cities in the UK is pretty universally 
natural gas-based. Outlying regions might use oil-based heating, storage 
heaters, or stranger systems, and places with broken or very old central 
heating or bad insulation might choose to stick electrical heaters in some 
rooms. Pure house-wide electricity-based systems are unheard of (by me at 
least): even heating your water with electricity is an emergency fallback 
for when the gas or boiler goes out. (It's also pretty much a historical 
curiosity: in thirty years I've never seen a built-in electrical immersion 
heater used, but they're still widely fitted).