Jackdaw gas won’t cut your energy bills

The Jackdaw gas field will not lower your energy bills. That is the conclusion both the BBC and This is Money reached this week, and it is the right one, but the two outlets take different routes to it, and the gap between them matters for anyone trying to work out what to do about their own bill.

The BBC asks how much gas Jackdaw could provide and whether it will cut bills. This is Money is blunter: drilling at Jackdaw won’t bring your bills down. Both are correct. The question for a UK homeowner is what does.

What Jackdaw is, and what it isn’t

Jackdaw is a North Sea gas field roughly 150 miles east of Aberdeen, operated by Shell. It was approved in 2022 and first gas flowed in 2024. It is a meaningful piece of national supply, a few per cent of UK annual gas demand at peak, but it is not a price lever. UK gas is priced against the National Balancing Point, which tracks European hubs, which in turn track global LNG. A new field adds supply at the margin. It does not reset the market.

The BBC’s framing, how much gas, and will it cut bills, is the question most households actually ask. This is Money’s framing is the answer: no. That is not a criticism of the field. It is a description of how a liberalised gas market works. The gas will be sold at the prevailing price, whoever buys it.

Why your bill doesn’t move with North Sea output

Ofgem’s price cap is set twice a year and reflects wholesale prices, network costs, policy costs and supplier margins. Wholesale gas is the largest single component, but it is priced globally. The UK imported around 60% of its gas in recent years; domestic production does not insulate households from international prices.

There is a second, less obvious point. Even homes with no gas connection pay for gas. Gas sets the marginal price of electricity in the wholesale market most of the time, so gas prices feed through to electricity bills too. A typical 3-bed semi using 2,700 kWh of electricity and 11,500 kWh of gas pays roughly £1,900–£2,200 a year on a standard variable tariff. Jackdaw does not change that arithmetic.

What actually cuts a bill, and by how much

The levers that work are the boring ones. Cavity wall insulation on a typical 3-bed semi costs £500–£1,500 and saves £150–£250 a year. Loft insulation top-up to 300mm costs £300–£600 and saves £100–£200. A well-installed air-source heat pump, replacing a gas boiler, cuts running costs by £200–£500 a year at current prices, and more if paired with solar and a time-of-use tariff.

The grants exist. The Boiler Upgrade Scheme gives £7,500 off an air-source heat pump in England and Wales. ECO4 funds insulation and heating upgrades for households on means-tested benefits or with low EPC ratings. The Great British Insulation Scheme (formerly ECO+) targets band D–G homes. None of these depend on Jackdaw.

The catch: grants are gated by your EPC

Here is where most homeowners stall. ECO4 and the Great British Insulation Scheme require an EPC of band D or lower for many measures. If your home is already band C, you are largely on your own, and a band C semi still has a gas bill. The Boiler Upgrade Scheme has no EPC gate, but installers will check that your home is heat-pump-ready: loft and cavity insulation, radiator sizing, and a hot water cylinder.

The other catch is timing. BUS vouchers are issued on a first-come basis within the annual budget, and installer lead times in England have stretched to 8–12 weeks for a full heat pump installation. Applying in November for a January install is realistic; applying in March for a June install is not.

What to do this month

First, pull your EPC from the gov.uk register, it is free and takes two minutes. If you are band D or lower, contact your energy supplier or a local authority retrofit officer about ECO4 and the Great British Insulation Scheme before the winter. If you are band C or above and considering a heat pump, find an MCS-certified installer and apply for the £7,500 BUS grant through gov.uk; the voucher is valid for three months.

Jackdaw will keep producing gas. It will not pay your bill. Insulation, a heat pump and a check on your EPC will, and the grants that fund them are open now.