Heathrow Substation Outage: NESO Review

Bill Esterson Excerpts

Wednesday 2nd July 2025 Commons Chamber

[Mr Deputy Speaker (Sir Roger Gale)]

I call the Chair of the Energy Security and Net Zero Committee.

[Bill Esterson (Sefton Central) (Lab)]

It beggars belief that no action was taken after the risks were identified in 2018 at the North Hyde substation. The NESO report highlights a lack of information-sharing internally at National Grid and externally between organisations. It draws attention to the energy companies not knowing that Heathrow had a 10 to 12-hour arrangement for switching supply, and that National Grid did not appear to know that Heathrow was a customer of the substation. It is a matter of immense luck that the explosion and fire took place at 11 o’clock at night and that no one was present; otherwise, this would have been a very different discussion, with people having died. The Minister highlighted the unacceptable lack of action by National Grid. Will he ensure proper oversight and information sharing internally at National Grid and externally between organisations, so that we have safety and resilience in our national energy system, where it applies to critical national infrastructure and beyond?

[Michael Shanks]

First, on the point about joining up, my hon. Friend is absolutely right. The response that I have seen from National Grid identifies that as one of the points it will take away. It will look at information sharing and joining up the data in various systems, and at how to ensure that is followed through on. It is important to say that there is also learning, not just for National Grid but across the energy system, through looking at what other transmission owners do and at what the Government do around sharing information where we can. There is a lot of learning and a lot of recommendations will be taken forward.

On the question of Heathrow, much was identified in the Kelly review, which looked specifically at these operations. On the question of whether there was a single point of failure at Heathrow, the airport is one of the biggest consumers of electricity in the country and one of our most important pieces of critical national infrastructure. It is important that those at Heathrow reflect on this report and take some lessons from it.

The report has shown—this is a lesson for everyone—the importance of investing in electricity resilience and preparing for the worst, even if we think there is a low chance of the worst actually happening. I completely agree with my hon. Friend’s final point: it is in all our interests to spend time, effort and investment in making sure that our energy system continues to be as resilient as possible.