The average UK household pays £1,928 a year for gas and electricity, up 54% since 2021, according to Ofgem. That is not a typo. It is the single biggest squeeze on living standards since the 1970s oil shock.
Last week the Liberal Democrats proposed a one-year energy price discount for every household, funded by a windfall tax on energy producers, as reported by BBC. The policy would save a typical household about £200, welcome, but temporary. The catch is that it does nothing to stop the next price spike.
Why temporary discounts are a distraction
The UK energy market is structurally broken. The UK imports roughly half its gas, and gas sets the wholesale electricity price under the current market design. That means any geopolitical tremor, a cold winter in Asia, a pipeline shutdown in Norway, feeds straight into British bills. A one-year discount does not insulate a single home or displace a single gas-fired power plant.
Ofgem data shows that the average household on a standard variable tariff has paid £2,500 more over the past three years than they would have under a fixed contract before the crisis. The discount would recoup less than a tenth of that gap. Worse, the policy risks creating a cycle of emergency relief that lets governments off the hook for the harder, more expensive work of retrofitting the UK’s leaky housing stock.
What permanent savings look like
The Energy Saving Trust estimates that a typical 3-bed semi-detached home could save £310 a year by topping up loft insulation from 100mm to 270mm. Cavity wall insulation saves another £255 annually. A heat pump, installed under the Boiler Upgrade Scheme (which offers £7,500 off), can cut heating bills by 20-30% compared to a gas boiler. Those are annual savings, not a one-off discount.
The Great British Insulation Scheme, launched in 2023, offers free or heavily subsidised insulation to low-income and fuel-poor households. Yet uptake has been slow, just 140,000 homes upgraded by mid-2024, against a target of 300,000. The Lib Dems could redirect their proposed windfall tax revenue, estimated at £2.5 billion, into scaling that scheme, or into a zero-VAT rate on all home retrofit work.
Who qualifies, and who doesn’t
The Lib Dem proposal would apply to all households, regardless of income or energy efficiency. That means a family in an EPC-rated A-rated new-build in Surrey gets the same discount as a pensioner in a draughty E-rated terrace in Sunderland. The latter needs more than a discount; they need a new boiler, double glazing, and wall insulation that costs £10,000-£15,000.
The government’s existing support, the Warm Home Discount (£150 for low-income households) and the Energy Price Guarantee (which capped bills at £2,500 until April 2024), already target the most vulnerable. A universal discount is simpler to administer but blunter in effect. Every pound spent on a household that does not need it is a pound not spent on a home that leaks heat like a sieve.
What this misses is the scale of the retrofit problem. The UK has 29 million homes, and 60% have an EPC rating of D or below. To hit net zero by 2050, the Climate Change Committee says 19 million homes need a heat pump by 2035. That is roughly 1,000 installations a day. The current rate is about 30. A discount does not install a single one.
Households on standard variable tariffs should not wait for politicians. The Boiler Upgrade Scheme is open now. Applications go through Ofgem. The Great British Insulation Scheme is available via local councils. Both are permanent. A discount lasts a year. The choice between a sticking plaster and a structural repair is not a close call.
Frequently Asked Questions
Unlikely in its current form. The party does not hold a majority, and the Labour government has not signalled support. Even if passed, the discount is a one-year fix that does not reduce underlying energy costs.
Check your EPC rating at gov.uk. If it is D or below, apply for the Great British Insulation Scheme or the Boiler Upgrade Scheme. Both are free or heavily subsidised for most households. You can also switch to a fixed-rate tariff if your current deal expires.
