Cleaning Up: Leadership in an Age of Climate Change8 Loka 2025

The £60 Billion Plan To Rewire Britain | Ep227: John Pettigrew

What does it take to rewire a nation’s energy system? Can we make the grid cleaner, smarter, and more resilient — without driving up bills? And how will the explosion of AI data centres reshape the future of electricity demand?

This week on Cleaning Up, host Michael Liebreich sits down with John Pettigrew, outgoing CEO of National Grid, for a candid conversation marking the end of his 35-year career. Together they explore the UK’s £60 billion plan to deliver Clean Power by 2030, the race to build transmission for offshore wind, the growing strain from AI-driven electricity demand, and lessons from major outages in Spain and Heathrow.

Pettigrew reflects on the evolving “energy trilemma” — balancing decarbonisation, reliability, and affordability — shares reflections from his 35-year career: what’s changed, what went wrong, and what comes next for the grids powering our clean energy future.

Leadership Circle:

Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Arup, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP of Portugal, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live.

Links and more:

John’s first appearance on Cleaning Up: https://youtu.be/1HVcJuO9dNI
Roger Dennis on Cleaning Up 'The Price of Resilience': https://youtu.be/CELQT31riDE
National Grid’s £60 billion plan: https://www.nationalgrid.com/gridforgrowth
National Energy System Operator (NESO): https://www.neso.energy/
Final report from what happened to the Heathrow substation: https://www.neso.energy/news/final-report-review-north-hyde-substation-outage

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