One Networked Grid: Electricity, Gas, Heating, Water

A country without energy is not a country. It is a territory, waiting for someone else to keep the lights on. Energy is not a sector of the economy. It is the physical substrate beneath every other sector. If electricity fails, hospitals stop. If gas fails, homes freeze. If water treatment loses power, sewage flows into rivers. If the grid cannot move energy from where it is generated to where it is needed, it does not matter how many turbines are spinning.

Britain has spent thirty years treating electricity, gas, heating, and water as four separate debates: each with its own ministry, its own ideology, its own consultants, and its own paralysis. They are not four debates. They are one machine. And the machine must be rebuilt for abundance, not managed for scarcity.

How Just-In-Time Became Doctrine

Britain's energy system was not always fragile. It became fragile by design — and the design had a name.

In the early 1990s, the privatisation of the electricity industry triggered what became known as the Dash for Gas. North Sea production was abundant. Gas was cheap. Combined cycle gas turbines were fast to build: three to four years, compared to a decade or more for nuclear or coal. High interest rates at the time punished slow, capital-intensive construction and rewarded speed. New private generators, entering a deregulated market for the first time, needed capacity quickly and at low cost. Gas gave them both.

In 1990, gas turbines made up roughly five per cent of UK generating capacity. By 2002 they made up twenty-eight per cent. The shift cost about £11 billion and rebuilt the entire generation mix within a decade. Coal, which had provided sixty-five per cent of UK electricity in 1990, began its long decline. Nuclear, which required state patience and long-term capital, was sidelined. The country traded depth for speed — and got it.

The problem was not the gas itself. Gas is a useful, flexible, energy-dense fuel. The problem was what the Dash for Gas left behind: a system architecture built entirely around continuous flow. Because North Sea gas was plentiful and pipelines ran short distances, there was no perceived need for strategic storage. Gas arrived daily, was burned immediately, and was replaced by more gas the following morning. This was not an energy system. It was a supply chain: and like all supply chains optimised for efficiency rather than resilience, it worked perfectly right up to the moment the world stopped cooperating.

When North Sea production peaked in 1999 and began its long decline, the just-in-time model should have been revisited. It was not. When the Rough storage facility closed in 2017 (removing seventy per cent of UK gas storage capacity) the model should have been replaced. It was not. The government told Parliament the closure would not affect security of supply. Five years later, with gas prices exploding after the Russian invasion of Ukraine, Rough was reopened in a panic at a fraction of its former capacity.

Britain did not stumble into a just-in-time energy system. It built one deliberately, during a brief window when the conditions happened to suit it, and then kept running it long after those conditions had vanished. The Dash for Gas was a rational market response in 1993. As a permanent national doctrine, it is negligence.

First Principle: Abundance, Not Optimisation

When Joseph Bazalgette built London's sewerage system in the 1860s, he did not build for current demand. He built for multiples of it. He assumed the city would grow. He assumed the system would be used harder than anyone expected. He assumed things would go wrong. The sewers still function a hundred and sixty years later, because they were designed for a city far larger than the one standing above them.

For three decades the country has done the opposite. It has built infrastructure to meet demand; just barely, just in time, with as little margin as the market will tolerate.

The Victorians did not ask whether they could afford to overbuild. They asked whether they could afford not to.

The replacement doctrine is the one Bazalgette already proved:

• Build more than you need.
• Store more than you expect to use.
• Maintain more capacity than the peak requires.
• Assume failure, not perfection.
• Target surplus, not balance.

If you build infrastructure to meet demand, you get fragility. If you build infrastructure to exceed demand, you get prosperity. When supply exceeds demand by a wide margin, wholesale prices fall, volatility disappears, industry can plan long-term, and the cost of everything from food to housing drops — because energy is embedded in the price of all of it.

The price of energy is the price of living. Overcapacity is not waste. It is what allows a society to function without constantly negotiating with reality.

100 Gigawatts of Sovereign Capacity

Britain should adopt a Minimum Sovereign Capacity Doctrine: at least 100 gigawatts of firm, controllable, domestically owned generation capacity maintained at all times.

For scale: this is roughly half the output of the Three Gorges Dam. Current UK peak demand is around 58GW. Official scenarios project peak demand rising to between 120 and 144 GW by 2050 as heating, transport, industry, and data centres electrify. NESO's 2025 Future Energy Scenarios project annual electricity demand growing from 290 TWh today to between 705 and 797 TWh by mid-century. Data centre demand alone could reach 30 to 71 TWh. Electric vehicle demand may add another 100+ TWh.

A system built for today's peak is already too small for tomorrow's baseline. A country unable to generate twice its peak demand is not secure. It is operating on goodwill. The 100GW target is not ambition. It is arithmetic.

Everything above and beyond the firm 100GW (wind, solar, imports) is supplementary. Useful, welcome, but never the foundation. The foundation must be controllable, sovereign, and available regardless of weather, geopolitics, or market conditions.

One System, Not Four Silos

A functioning national infrastructure has four tightly coupled layers, and a sane policy treats them as one:

1. Generation: nuclear, tidal, gas, wind
   1. -> producing power at scale.
2. Storage: gas reservoirs, grid-scale batteries, pumped hydro, hydrogen, thermal reserves.
   1. -> buffering against disruption and seasonal demand.
3. Distribution: the transmission grid, connection access, physical resilience.
   1. -> moving power from where it is made to where it is needed.
4. End use: domestic heating, industry, transport, data centres, water treatment
   1. -> the demand the system exists to serve.

Britain currently has policies for each layer and no policy for the system. Each layer is argued over in isolation: electricity as an emissions question, gas as a moral failing, heating as a consumer mandate, water as someone else's problem. The result is four arguments producing four sets of targets, four agencies, four consultancies, and no coherent machine.

Any serious policy must treat electricity, gas, storage, and domestic heat as a single engineered system: judged first by whether it keeps the country functioning, and only then by whatever else ministers wish to drape over it.

The Generation Architecture

For a system sized at roughly 750 TWh (the midpoint of the official 2050 range) the generation mix should look like this:

Nuclear: 30–35 per cent (~225–260 TWh)

Nuclear is the only mature, firm, low-carbon source able to carry a large share of baseload within a reasonable timescale. Britain currently produces 35.9 TWh from nuclear, or half the output of a decade ago, the lowest in fifty years. The entire existing fleet bar one station will retire by 2030.

A sane long-term posture requires roughly 250 TWh from nuclear at a sevenfold increase. It is a national reconstruction programme: large-scale stations such as Hinkley Point C and Sizewell C, plus a fleet of small modular reactors deployed to strategic locations across the mainland and to overseas territories (Gibraltar, the Falklands, Caribbean dependencies) which currently run on diesel shipments with no energy sovereignty whatsoever. A sovereign nation does not power its strategic outposts with fuel it must ship seven thousand miles.

Nuclear also has a second function. Surplus nuclear output during periods of low demand can be used to produce hydrogen through electrolysis, converting electricity into a storable, portable energy carrier. This links the generation system to the storage and transport systems described below. Energy sovereignty does not stop at the coastline.

Tidal: 20–30 per cent (~150–225 TWh)

Britain is an island surrounded by some of the most powerful tidal flows on earth. The resource is enormous, predictable to the minute decades in advance, and sovereign by definition; no foreign government controls the tides. The UK holds an estimated fifty per cent of Europe's tidal energy capacity. No other major economy possesses a comparable natural advantage in any single renewable source and fails so completely to use it.

France built the La Rance tidal barrage in 1966. It took three years to construct, and still operates sixty years later, generating 600 million kilowatt-hours annually; enough to power a city the size of Rennes. South Korea has built two large-scale tidal plants. Britain, despite possessing the strongest tidal resource in Europe, has not built tidal power at meaningful national scale. The Swansea Bay tidal lagoon, a £1.3 billion project capable of powering 155,000 homes, received planning permission in 2015. The government rejected it in 2018 on the grounds it was not "good value for money." The same government continued subsidising the import and burning of North American wood pellets at Drax, and calling the result renewable.

The argument against tidal is always cost per megawatt-hour at present scale. This is true of every new energy technology before it reaches volume. Offshore wind cost over £165 per MWh in early UK contracts. It now comes in below £60. Tidal stream costs have already fallen from roughly £300 per MWh to around £170, with credible projections showing £78 by 2035 and below £50 by the late 2040s. Tidal range (barrage and lagoon structures) follows the same trajectory as every large civil engineering project: expensive at prototype, cheap at scale, and almost free when amortised over a 120-year operational life.

The absurdity is not the cost; it is possessing the finest tidal geography in Europe and doing nothing with it because the first project has not yet paid for itself. France did not wait. South Korea did not wait. Britain waited, and now it needs to build at speed rather than at leisure. This is the price of stalling.

Reaching 20 per cent or more of a 750 TWh system from tidal requires a genuine national build programme. The current UK tidal base is negligible. The ambition is correct and the honesty required is to state the programme will take a generation — and to begin now rather than wait for perfection.

Wind: 15–20 per cent (~110–150 TWh)

Wind already delivers 87 TWh and will grow further as offshore capacity expands. It is useful. It is not dependable. Wind generates when conditions allow, not when demand requires - even in the windy North Sea. A system built around wind is a system built around hope.

Wind should provide a substantial share of generation, but it should never be the pillar upon which everything else depends. It is supplemental, not foundational.

North Sea Gas: 10–15 per cent (~75–110 TWh)

Domestic gas from the UK continental shelf is a strategic asset. It should be used not as a transition fuel waiting for replacement, but as a permanent dispatchable stabiliser providing firm power when other sources cannot. A country sitting on proven reserves while banning new exploration is not conducting energy policy. It is conducting performance.

Solar: Distributed and consumer-led

Solar is useful for reducing individual household bills and should be encouraged at household and commercial level. It should not be treated as a structural pillar of national generation. It produces almost nothing during winter evenings precisely when demand is highest.

Biomass: Ended as a subsidy category

Shipping wood pellets across the Atlantic, burning them, and pretending you are a green messiah is an accounting trick. Subsidies for large-scale imported biomass should be ended entirely. If a plant can compete on its own merits, it may operate. Otherwise it closes.

Strategic Reserve: ~5 per cent emergency capacity

Oil, coal, and black-start capability held separately from normal generation. Maintained for crisis; not daily use. This is insurance, not production.

Hydrogen: What Happens After Abundance

Hydrogen is not a source of energy. It is a carrier: a way of moving energy from where it is produced to where it is needed, in a form the grid alone cannot deliver.

Britain has no abundant natural supply of free hydrogen. It must be manufactured, and manufacturing it requires energy. This is precisely why hydrogen belongs after the abundance argument, not before it. When nuclear, tidal, and wind produce more electricity than the grid requires (and in a system built for surplus, this will happen regularly) the excess can be converted into hydrogen through electrolysis. Water in, electricity in, hydrogen out. No carbon. The output is a gas able to be stored, piped, compressed, and transported to places the grid cannot reach.

Hydrogen fills three gaps no other technology addresses:

1. Heavy transport: (shipping, long-haul freight, aviation) where batteries cannot deliver the range or the weight economics.
2. Industrial heat: (steel, cement, glass, chemicals) where the temperatures required are beyond what the grid can efficiently supply.
3. Long-duration storage (weeks or months rather than hours) bridging seasonal gaps in generation by storing surplus energy in salt caverns and pressurised vessels for release when needed.

NESO's scenarios project between 98 and 328 TWh of hydrogen powering the network by 2050. Scotland alone could produce between 21 and 126 TWh annually from offshore wind, tidal, and reformed gas. Britain's industrial clusters (the Humber, Teesside, South Wales) are already developing hydrogen infrastructure.

The principle is straightforward:

• Build enough generation to produce surplus electricity
• Convert the surplus into hydrogen, and
• Use the hydrogen where electricity alone cannot reach.

This is not a separate policy. It is the natural consequence of building for abundance.

Storage: Weeks, Not Days

Britain should hold weeks or months of gas-equivalent energy storage, not days. Germany holds months of gas. France holds far more than Britain. Italy more still. Britain's position among its peers is not merely poor. It is negligible.

The programme:

• Gas storage on the scale of the Rough facility and beyond: expanded, fully restored, and treated as sovereign infrastructure rather than a commercial decision. Centrica has offered to invest £2 billion to restore Rough to full capacity. The government should provide the regulated return model required to make it happen.
• Grid-scale batteries and pumped hydro: multi-hour to multi-day storage deployed across the transmission network, sited to reduce regional imbalance and absorb surplus generation.
• Hydrogen storage in salt caverns and pressurised vessels providing the seasonal and multi-week buffer the grid and batteries cannot. This is where hydrogen's role as a carrier becomes a storage function: surplus electricity converted to hydrogen during periods of high generation, stored underground, and reconverted to electricity or used directly when needed.
• LNG buffering capacity maintained as a strategic reserve, not a market convenience.

Storage is not a market decision. It is a national security asset. A country with twelve days of gas and no strategic electricity reserve is not managing risk. It is ignoring it.

The Grid: From Bottleneck to Backbone

The grid connection queue grew to over 700GW of projects, which roughly four times the capacity required by 2030. Over 1,700 new applications arrived in 2023 and 2024 alone. The queue was clogged with speculative applications, zombie projects holding positions with no ability to build, and a first-come-first-served regime disconnected from national need. About 140 data centres are now waiting to connect, with combined requirements exceeding the current peak demand of the entire country.

NESO has begun reforms, apparently reordering the queue, prioritising readiness and strategic value, reducing the pipeline from over 700GW to roughly 283GW of deliverable projects. This is necessary. It is the beginning, not the solution.

Britain does not lack energy. It lacks the ability to move it.

Three further principles must govern the grid going forward:

Build ahead of demand

The grid should never be the bottleneck. Transmission capacity must be overbuilt (deliberately, in the Bazalgette manner) so the system can absorb new generation and new demand without years of delay. A grid sized for current need is already too small for tomorrow's.

Underground critical infrastructure

Britain's overhead transmission lines are vulnerable to storms, to sabotage, and to wartime attack. A long-term programme of undergrounding critical transmission should begin now. The upfront cost is higher; the resilience over a century is worth it. Underground wiring is not only more secure: it removes one of the principal objections to new infrastructure by eliminating the visual impact entirely. A grid unable to survive disruption is not infrastructure, it is decoration.

It is disgustingly ugly. The Turks & Caicos doesn't do this.

Separate strategic from flexible load

Not all demand is equal. Homes, hospitals, water treatment, and defence installations receive unconditional supply priority. Data centres, EV charging, and industrial flex-load can shift to follow supply patterns. The grid should reflect this distinction rather than treating every connection as identical.

Heating: The Hard Problem

Heating is not just another demand. It is the demand arriving all at once. It is the single area where the "electrify everything" doctrine collapses.

Gas is not dominant in home heating by accident, but because it is energy-dense, storable, and instantly available when needed. Electricity struggles with all three during the precise conditions (cold, dark winter evenings) when heating demand peaks. Every home drawing electrical heating simultaneously on a January night would produce a demand spike the grid cannot survive.

The replacement model has five components:

Retain gas as the strategic heating backbone

Not forever. Not without improvement. But removing gas from 23 million homes before the electrical system can support the load is not a plan. It is a prayer. Gas heating should be improved, sourced domestically where viable, stored in bulk, distributed through modernised infrastructure, not abolished on a political timetable.

Deploy hybrid systems at household level

A heat pump handles baseline heating and mild weather. A gas boiler handles peak winter demand and backup. This cuts gas consumption substantially without eliminating it, reduces grid strain, and avoids the catastrophic peak demand spikes an all-electric system would produce. It is the most practical and politically survivable path.

Decentralise heat production

This is the key conceptual shift. Heat is bulky, lossy over distance, and needed locally. Electricity is light, transferable, and centralisable. The two should not be forced through the same pipe. A country routing all heating demand through its electrical grid is designing for failure. Heat should be produced as close as possible to where it is used: household hybrid systems, neighbourhood thermal storage, local combined heat and power, waste heat capture from data centres and industrial sites.

Invest in local thermal storage

Hot water tanks (domestic and district-scale) phase-change materials, and neighbourhood thermal reservoirs can store heat when energy is abundant and release it when demand peaks. This flattens the curve without requiring massive grid expansion. It is unglamorous. It works.

Use district heating selectively

District heating is effective in dense urban areas, new developments, and sites near industrial heat sources. It should not be forced across the entire housing stock. Where it works, build it. Where it does not, leave it alone.

The governing principle for heating policy: reliability in winter, not theoretical efficiency across a year. Any policy unable to keep homes warm during a cold snap without risking system failure is not serious.

Water and Sewerage: Overlooked Dependency

Energy, water, and sewerage are not separate systems. They are the same system. Water treatment is energy-intensive. Sewage processing runs continuously. Pumping depends on the grid. If the electricity fails, the sewage flows backwards. Any fragility in the energy system produces an identical fragility in the water system.

Water infrastructure must be integrated into the sovereign infrastructure doctrine: backup power guaranteed at all critical treatment and pumping facilities, co-location of energy and water infrastructure where possible, and a recognition — apparently novel to current policymakers — of the obvious interdependency.

Britain cannot fix its rivers, its sewage overflows, or its water quality without first fixing its energy resilience. The two are the same problem wearing different clothes.

Work For Qualified People

Not consultants. Not quangos. Not advisory boards producing strategy documents for other advisory boards to review.

• Nuclear stations require nuclear engineers, project managers experienced in gigawatt-scale construction, and a regulatory regime willing to approve designs in years rather than decades.
• Tidal arrays require marine engineers, civil engineers, and manufacturing capacity for turbines and barrage structures.
• Grid expansion requires electrical engineers, wayleave negotiators, and construction crews.
• Underground cabling requires specialist boring and installation capability.
• Hydrogen infrastructure requires process engineers, electrolyser manufacturers, and pipeline specialists.
• Water infrastructure requires process engineers and civil works capability the country once possessed and has allowed to atrophy.

The people who deliver this are not institutions.

They are welders, turbine fitters, cable layers, reactor designers, project directors, and structural engineers.

The state's job is to train them, attract them, remove obstacles from their path, and pay them enough to stay. The Royal Sovereign Capacity Guild, described in Article 1 of this series, exists precisely to restore this class of people to the centre of national life.

Common Sense Spending

A sensible programme of this scale (nuclear fleet construction, tidal build-out, grid doubling, storage expansion, underground cabling, hydrogen infrastructure, water hardening) will cost in the range of £200–350 billion over ten years. Call it £20–35 billion a year.

This is a great deal of money. It is also less than the UK spends annually on debt interest accumulated funding systems producing no measurable output. It is a fraction of the £400 billion freed by the defunding of non-productive state expenditure guzzled by quangos. And it is the price we now have to pay of not acting sooner: the cost of three decades of stalling, deferring, and hoping the just-in-time model would hold. It did not hold. The bill has arrived, and it is larger than it needed to be because every year of delay made the eventual reconstruction more expensive.

It is also less than the cost of continued inaction. The cumulative price of energy crises, industrial flight, import dependency, household poverty, and strategic weakness over the same period would dwarf the capital required to prevent them.

Cheap, abundant energy is not a subsidy. It is the foundation of prosperity. Every pound spent on overcapacity is a pound not spent on emergency pricing, crisis management, and industrial decline.

How It Fails Again Without Vigilance

This system fails if ideology is allowed back into energy policy. If:

• Nuclear is blocked by political anxiety
• Tidal is abandoned because the first project overruns.
• Gas is demonised until the last domestic well is capped.
• Hydrogen is treated as a slogan rather than an engineering programme.
• The grid is treated as someone else's problem.
• Storage is left to the market, and the market decides the margin is insufficient.
• Heating policy is driven by consumer mandates rather than engineering reality.
• Overseas territories are forgotten because they are small and far away.
• The programme is handed to the same consultancies and contract structures responsible for the current mess.

It fails if the government treats energy as a political instrument rather than a physical system. It fails if risk is avoided so completely nobody attempts what is necessary.

Detecting Failure Being Obscured

Every generation project is published with a commissioning date, a capacity target, and a cost envelope. Every missed date is reported publicly: not buried in a departmental review. Storage levels are published daily, in real time, accessible to anyone. Grid connection timescales are tracked and published, with automatic penalties for delay beyond stated deadlines.

A National Energy Audit, independent of government (staffed by real engineers rather than economists) publishes an annual assessment of system margin, storage depth, connection throughput, hydrogen production capacity, and projected demand against planned capacity. If margin falls below a stated threshold, the audit triggers a mandatory parliamentary debate. Not a review. Not a committee. A debate, on the floor, with named ministers answering for specific failures.

Energy is too important to be monitored by the institutions responsible for delivering it. The people who build the system must not be the same people who judge whether it works. Separation of delivery and scrutiny is not a luxury. It is the mechanism by which failure becomes visible before it becomes catastrophic.

Britain once built systems so large future generations could not exhaust them. Today it builds systems so tight a cold week can break them.

A serious country does not count megawatts like calories. It builds until scarcity disappears.

Scarcity is not a natural condition. It is a policy choice. And a reflection of political competence, for which the results are now in.