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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11 Maalis 1h 9min

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Bryony Worthington and Michael Liebreich give their analysis of the impact of the conflict in Iran on global energy markets. How will it impact the Middle East, Europe, Asia, the US, and will it force...

6 Maalis 52min

⁠⁠How To Build Quickly In An Era of Fossil Fuel Shocks | Ep247: Hilde Tonne

How can we build out clean energy and infrastructure faster? Is Europe engineering its way to resilience, or pricing itself out of competitiveness? And can we redesign the entire system fast enough to...

4 Maalis 53min

The Audacious Plan To Build a Transatlantic Electricity Cable | Ep246: Laurent Segalen

This week on Cleaning Up, host Bryony Worthington sits down with investor and energy strategist Laurent Segalen, co-host of the Redefining Energy podcast, for a sweeping conversation that spans carbon...

25 Helmi 51min

Why Renewables Are Booming Despite the Politics | Ep245: Miguel Stilwell d'Andrade

This week on Cleaning Up, Michael Liebreich sits down with Miguel Stilwell d’Andrade, CEO of EDP, one of the world’s leading clean energy companies.From the front lines of the energy transition, Migue...

18 Helmi 1h 3min

The Billion-Tonne Promise of Carbon Dioxide Removal Isn't Working Out | Ep244: Robert Höglund

This week on Cleaning Up, Michael Liebreich sits down with carbon removal insider Robert Höglund, CEO of Marginal Carbon, co-founder of CDR.fyi and architect of MilkyWire’s Climate Transformation Fund...

11 Helmi 1h 9min

The World Decides: Clean Energy or Oil & Gas? | Ep243: Damilola Ogunbiyi

What if the future of clean energy isn’t decided in Washington, Brussels, or Beijing, but in Lagos, Nairobi, and Addis Ababa? Are we underestimating how fast the Global South is leapfrogging fossil fu...

4 Helmi 56min

The State of the Climate 2026 | Ep242: Zeke Hausfather

How do we model the climate system? How warm will 2026 be? And can geoengineering be anything more than a bandaid? This week on Cleaning Up, Bryony Worthington sits down with leading climate scientis...

28 Tammi 1h 11min