For twenty years, UK electricity demand fell. More efficient appliances, deindustrialisation, and energy-saving habits all pushed consumption down year after year. That trend has now reversed. According to Dr Iain Staffell, lead author of Electric Insights at Imperial College London, Britain’s electricity demand has grown for two consecutive years, rising 1.7% in 2025 alone, driven by a mix of commercial AI data centres and the clean technology sitting in UK homes like EV’s and heat pumps.
What’s driving it
Three things are pushing this demand back up, rapid growth in electric vehicles and heat pumps, and surging demand from AI and digital services. Electric vehicles made up roughly 27% of new car registrations in 2025, and as that fleet grows, charging adds steadily to residential and overall energy consumption. UK data centre demand separately is forecast to quadruple by 2030.
For UK households, the heat pump and EV side of that story is the part that lands on your own electricity bill. More homes switching their heating and transport from petrol and gas to electricity is precisely why national demand is climbing after twenty years of decline.
The good news buried in the numbers
Renewables and nuclear power supplied more than three fifths of Britain’s electricity demand in 2025, with renewable generation hitting its highest share on record. Yet, even as clean energy expands to meet rising demand, the transition is hitting roadblocks. Because an ageing nuclear fleet dropped to a 50-year low, the grid had to rely on a slight increase in fossil gas to keep the lights on. This proves that pulling a national grid toward a fully clean future while demand rises remains an incredibly delicate balancing act.
The catch: electricity is still expensive relative to gas
UK households currently pay around 4.7 times more per unit for electricity than for gas, a significantly higher ration than in France, the United States or Japan.
This ratio matters because it works directly against the shift that’s driving demand growth in the first place. Switching from a gas boiler to a heat pump, or from a petrol car to an EV, only makes clear financial sense if the electricity is reasonably priced relative to what it’s replacing. Dr Staffell has said that the UK has cleaned up how it generates electricity faster than almost any major economy, with renewables breaking records and meeting rising demand. But the same report warns Britain risks falling behind other major economies specifically in the shift to electric heating and transport, precisely because of this pricing gap.
What this means for you
If you’re already running an EV, a heat pump, or both, you’re part of the reason this trend exists, and you’re also the household most exposed to the electricity-to-gas price gap. Understanding exactly how much of your bill comes from charging, heating and everything else isn’t just useful, it’s the only way to know whether your own setup is working as efficiently as it could be, given how lopsided energy pricing currently is.
The Hugo Energy app tracks your real electricity and gas consumption in real time, so you can see exactly what your EV charging or heat pump is actually costing you, rather than guessing against a national average that is changing faster than it has in 20 years. And if you’re wondering whether your current tariff is still the right one given how differently electricity and gas are now priced. Hugo Energy’s Tariff AI checks your actual usage against every available tariff in your postcode and tells you whether switching would genuinely save you money. It’s available for £2.99/month as part of your Hugo Energy subscription.
Balancing the grid
Rising demand also changes what the grid needs from households, not just what it costs them. More EVs and heat pumps drawing power at the same times, typically evenings and cold snaps, means those peaks get sharper even as the overall mix gets cleaner. A grid built around cleaner generation still needs somewhere to go when it spikes, and increasingly, that’s home batteries storing power when it’s abundant and releasing it when it’s needed most.
This is what Virtual Power Plant (VPP) technology is built for. It connects home batteries into a single network that can support the electricity grid during periods of high demand. In return, battery owners are paid for the power they contribute.
This is the technology behind Hugo Flex. With a Hugo Energy Super subscription, you keep 100% of the value of the power you export back to the grid. We don’t take a percentage cut.
If you’ve got a home battery, whether it’s paired with solar, or not, registering your interest means you’ll be among the first to know when Hugo Flex is live.
To find out more or register your interest in Hugo Flex visit https://hugoenergy.com/hugo-flex or email [email protected].
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