The government’s paper on the Future Homes and Buildings Standards published last week shows resolve to improve energy security in the UK, by going green.
“The Iran War has once again shown our drive for clean power is essential for our energy security so we can escape the grip of fossil fuel markets we don’t control,” said Energy Secretary Ed Miliband.
Energy prices in the UK now rise and fall with geopolitics. This is not surprising when you consider we heat 85% of our homes with gas, and around two‑thirds of the gas used in the UK comes from abroad. When global events disrupt supply routes or push up fuel prices, UK households feel the impact within months.
By comparison, Germany heats around 56% of homes with gas and Spain about 42%. Other European countries have gone further: in Estonia, roughly 67% of heat consumption already comes from renewable sources.
The UK’s reliance on imported gas—whether via pipelines or as liquefied natural gas—has historically been stable, but the fragility of that position has been laid bare twice in quick succession: first by Russia’s invasion of Ukraine, and now by the energy market turbulence following the escalation of the US–Israel conflict with Iran.
Our thoughts are first with those directly affected by the violence in both conflicts; the human cost comes before markets. Here we will look at how such events affect UK energy bills—and why heat networks belong firmly in the conversation.
Wholesale gas and electricity prices have surged since the latest conflict escalated, with forecasters warning of a likely rise in the Ofgem price cap from July if high prices persist. Risk around the Strait of Hormuz—through which about a fifth of global oil and a large share of seaborne gas moves—has pushed global gas benchmarks higher. Threatened flows mean higher wholesale costs, and eventually higher UK bills. Ofgem’s April–June cap is already set, but sustained volatility would lift future caps.
Because electricity prices are tied to gas (as gas often sets the marginal price), fluctuations in imported gas affect both heating and electricity bills. Expanding diverse heat networks and reducing reliance on gas boilers would not eliminate exposure entirely but it would meaningfully reduce the UK’s vulnerability to price shocks across both fuels. Firstly, it would reduce the gas directly required to heat homes. Secondly, reducing the amount of gas consumed nationally would lessen the impact of gas prices on electricity prices.
Heat networks—local systems distributing hot water or steam from central, flexible sources—are designed to reduce dependence on imported gas by integrating waste heat and low‑carbon energy at scale. They are a key part of the UK’s decarbonisation strategy but, crucially, they are also a resilience measure: a way to protect communities from global energy turbulence.
According to the Future Homes and Buildings Standards, the role of heat networks from 2028 is going to be increasingly important for decarbonising and building energy resilience.
New homes connecting to heat networks will need to show most of their heat comes from low‑carbon sources. Networks can prove this in two ways:
If a site needs temporary heating before the network is ready, that temporary system must also be low‑carbon. These rules mean housing providers will need clearer plans for how their networks decarbonise and how new connections are verified.
Another element of the standards is to make plug-in, smaller solar panels for domestic use much more widely available, something over 1 million homes in Germany already benefit from.
Despite the clear, all-round gains, large heat network projects often attract political attention as symbols of “net zero”, making them lightning rods for wider arguments. But on the ground, the case is straightforward: heat networks reduce exposure to imported gas, unlock cheaper local heat sources, and provide stability when global prices spike.
Government analysis highlights their flexibility—waste heat, large heat pumps, energy-from-waste, geothermal, rivers—and their substantial investment potential through to 2050.
Public support for decarbonisation remains strong, and the sector is moving into a more consumer‑friendly era. In January this year, Ofgem began regulating heat networks, bringing protections closer to those in gas and electricity: clearer billing, price protections, stronger standards and proper dispute resolution.
But as long as gas sets power prices, households won’t fully feel the benefit of cheaper renewable generation. Heat networks help break that link by tapping “free” or low‑cost local heat sources—data centres, industry, rivers—and by smoothing out wholesale price swings.
Gas power stations turn only part of the fuel they burn into electricity. Older stations that use a “simple cycle” (basically a big gas turbine with no recycling of heat) lose most of the energy as waste heat. Newer “combined‑cycle” stations capture and reuse that heat to make more electricity, so they’re more efficient—but they still waste a lot of energy overall.
Modern heat networks, sometimes called “fifth‑generation” networks, work very differently. Instead of each home burning gas, a whole area can share efficient, centralised equipment that can use:
• large heat pumps that are far more efficient than a boiler,
• waste heat from data centres, industry or sewage systems that would normally just disappear into the air,
• thermal storage, which acts like a “heat battery” to avoid buying energy when prices peak.
Together, these tools make the whole system more efficient and more resilient during price spikes.
A big advantage is that heat networks can change their energy source without changing the heating system in every home. A network that uses combined heat and power today—where one plant makes heat and electricity at the same time—can switch later to large heat pumps, industrial waste heat, or other cleaner options. That built‑in flexibility protects customers from future fuel shocks in a way individual boilers never can.
The UK’s low‑carbon economy is already large and expanding—£77 billion turnover in 2024—and heat networks require project managers, pipefitters, electricians, controls engineers and customer service teams. Many of these skills transfer directly with targeted upskilling.
In a world where geopolitics can double gas prices in days, local, flexible heat isn’t a culture‑war symbol—it’s basic resilience. Heat networks cut through the noise around net zero and focus on what matters to consumers: more local energy, less exposure to global gas shocks, and a pathway to fairer, more stable bills as regulation strengthens in 2026.
We cannot control global events, but we can control how exposed our heating and energy systems are to them.
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