UK Energy Storage (UKEn) has the mission of ensuring this country’s energy security and, ultimately, Powering Britain. In support of government objectives to achieve Net Zero, and responding to National Grid future energy scenarios, UKEn is working to help drive the UK’s transition to environmentally friendly fuels and British energy independence, developing the UK’s nascent hydrogen economy and future use of new energy storage technology. UKEn emphasises the necessity of strategic infrastructure defined and built to encompass the whole green hydrogen energy chain – production, storage, distribution and use. UKEn is currently developing the Portland Hydrogen hub as the largest-yet salt-cavern hydrogen storage solution to be envisaged for the UK. Salt-cavern storage, a proven technology used successfully in the UK since 1972, is fast becoming a focus for investment and national development around the world. The Portland Port site is strategically located between the South Wales and Southampton industrial hubs and within a deep-water port. Its modular storage facilities will provide around 15% of the UK’s initial hydrogen storage requirement and provide one of the UK’s first major ‘hydrogen batteries’ to capture and store excess renewable wind power via on-site green hydrogen generation. UKEn’s Portland Hydrogen Hub envisages initial throughput of 28m m3 /day 1 bcf/day (1 bcf/day ), equivalent to 14% of the UK's daily natural gas demand. The project will support the UK’s energy mix diversification, attract investment, create jobs, reduce carbon emissions, and deliver 1.2 bcm (~43 bcf ) of new underground storage in phase 1 – a 70% increase in the UK’s current capacity – clearly demonstrating the UK’s leadership and commitment in innovative green technologies.