Based on reporting by Matt Oliver and Jonathan Leake, The Telegraph, 26 July 2026.
On the evening of June 23, while England fans settled in to watch the game against Ghana, engineers in a control room in Reading were fighting to stop the country’s power grid from collapsing.
At 8pm precisely, grid frequency hit 49.656Hz, the lowest reading of the year, and dangerously close to the threshold at which equipment starts shutting itself down to prevent a cascading blackout. Britain’s battery reserves were nearly empty. Spare gas capacity in the South had shrunk to just 80 megawatts. There was, in the words of one independent analyst, “no reserve left.”
So what did we do? We picked up the phone and begged the French.
Within minutes, RTE, France’s grid operator, obliged, reversing the flow on three interconnectors and sending nearly two gigawatts of power back across the Channel. Crisis averted. Nobody’s television went dark. But make no mistake: this was not a triumph of British engineering. It was a rescue. And it should never have been necessary in the first place.
An avoidable crisis, dressed up as routine
Neso, the body responsible for keeping Britain’s lights on, insists the system worked exactly as it should. That is one way to describe a day on which a fifth of the country’s generating capacity was offline, wind output undershot forecasts, solar collapsed with the sunset, a key interconnector had already failed at 1am, and grid operators were quietly buying emergency power at more than three times the normal rate without telling the market what was happening. Whistleblowers now allege Neso tried to bury the evidence of just how close things came. That allegation is being investigated. It should never have needed to be made.
This is not “the system working.” This is the system surviving by the skin of its teeth, and getting lucky. The very next evening, one of the interconnectors that rescued Britain on June 23 suffered its own outage. Had that happened 22 hours earlier, there would have been no French cavalry to call on, and no guarantee the outcome would have been so benign.
The cost of dependency
Since Labour came to power, energy strategy in this country, accelerated hard under Ed Miliband, has been built on a bet: that Britain can retire dispatchable, reliable capacity at home and lean instead on imported power and the weather cooperating. June 23 was the bet coming due. Gas plants that should have been available were down for maintenance or crippled by heat. The South of England, in particular, is short of gas capacity, a gap experts say has no serious plan behind it to close. Meanwhile a single national electricity price meant the market never signalled the danger building in the South until it was almost too late.
This is what “energy security” looks like under a government that has spent its time in office talking about clean power targets while quietly increasing our exposure to a foreign grid we do not control. Renewables have their place. Nobody serious argues otherwise. But a grid this thin on domestic reserve, this reliant on interconnectors that can and do fail without warning, is not a grid built for a sovereign, self-reliant nation. It is a grid built on hope.
What Labour should be doing, and isn’t
Britain sits on substantial remaining reserves of oil and gas in the North Sea. Instead of licensing new development and using the revenue and output to rebuild a domestic buffer of dispatchable power, this government has gone in the opposite direction, squeezing the North Sea sector with tax rises and a de facto ban on new exploration, while offering no serious, funded plan for the gas capacity in the South that its own advisers say is missing. Adam Bell, formerly a government energy official himself, is blunt about it: the problem on June 23 wasn’t a shortage of generation nationally, it was that “the generation was in the wrong place,” and there is no real plan to fix that.
A government serious about keeping the lights on would be doing three things at once: licensing new North Sea production to rebuild domestic supply and revenue; building the strategic reserve of gas-fired capacity that experts are now openly calling for; and reforming a pricing system that hides scarcity instead of revealing it. Instead, ministers respond to a near-miss of this magnitude with a bland reassurance that “at no time has there been any concern about being able to meet demand.” Millions of people watching a football match while their grid touched the edge of a blackout might reasonably ask who, exactly, that line is meant to reassure.
The bigger picture
This isn’t really about one warm evening in June. It’s about whether a government can be trusted with the most basic function of the state: keeping the power on.
Labour has spent its time in office accelerating the trends that turned June 23 into a near-miss, while offering warm words instead of the unglamorous, practical fixes — more dispatchable capacity, more domestic production, honest pricing — that people who actually run grids for a living are asking for.
If ministers cannot be candid about how close we came this time, why should the public trust their assurances about next time?
Britain used to generate its own security. It’s time we started doing so again.
