Appointment of Chief Scientific Adviser

EnergyPathways plc ("the Company") is pleased to announce the appointment of Martyn Millwood Hargrave as Chief Scientific Adviser to the CEO and Board. His appointment further strengthens the Company's technical, strategic, and policy capability as it advances its MESH energy storage project and its broader integrated energy, hydrogen and industrial materials ambitions.

The Company's MESH project, expected to be Britain's largest integrated energy storage project, will bolster Britain's energy security and lower consumer bills. Designated a project of "national significance" by the UK Government, MESH combines compressed air electrical storage ("CAES") with natural gas and hydrogen storage. Located in the Irish Sea and connected into Barrow-in-Furness, the project utilises large scale subsea storage, designed to store energy in a highly cost-effective manner.

In addition to energy storage, MESH has the potential to produce synthetic graphite - a critical mineral - for use in civil nuclear, defence and battery applications.

Martyn Millwood Hargrave is a geoscientist, business entrepreneur and strategic adviser with over 40 years of experience across subsurface technology, energy systems and industrial innovation. He is the founder and former CEO of Ikon Science, a global subsurface software company acquired by Constellation Software in 2025.

Martyn is currently a Visiting Professor in Earth Sciences at the University of Oxford and a Senior Associate at Oxford Net Zero. His experience spans global hydrocarbon E&P, carbon capture and storage, hydrogen, geothermal energy, nuclear waste disposal, and greenhouse gas removal. He has advised governments, regulators, and industry bodies on technically complex and strategically significant projects.

In his role as Chief Scientific Adviser to EnergyPathways and specific to the MESH project, Martyn will support technical, strategic, and policy development, with a focus on subsurface systems, integrated energy infrastructure, hydrogen, industrial decarbonisation, and strategic materials opportunities associated with graphite value chains.

The development of MESH will play a critical role in UK energy security, in the UK's energy transition and the development of industrial supply chains. MESH aligns closely with the UK's energy, industrial and economic growth strategies, alongside the UK's 2035 Critical Minerals strategy ambitions.

Ben Clube, CEO of EnergyPathways, said:

"Martyn brings an exceptional combination of scientific depth, entrepreneurial experience, and strategic insight. His background will be highly valuable as we advance MESH and broaden the strategic relevance of the project, including its potential role in long duration energy storage, hydrogen and graphite-linked industrial opportunities."

Martyn Millwood Hargrave added:

"EnergyPathways is developing a highly distinctive platform at the intersection of energy security, storage, and industrial decarbonisation. MESH has the potential to become a vital UK project through the industrial opportunities emerging around energy storage, power generation, hydrogen and graphite. I am delighted to be advising the Company and its Board and look forward to supporting Ben and the wider team."

Investor Engagement with EnergyPathways