Centrica and HiiROC, supported by the Net Zero Technology Centre (NZTC), have demonstrated the injection of hydrogen into a gas-fired peak power plant at Centrica’s Brigg Energy Park, North Lincolnshire, England. The trial that took place on 11 September 2025 marks a UK first in using hydrogen to decarbonise peak power generation supplying power directly to the electricity grid.
HiiROC’s modular hydrogen production technology, using Thermal Plasma Electrolysis (TPE), produced hydrogen on site which was then blended at a 3% ratio for the purposes of a one-hour trial.
The trial marks a further step forward in Centrica’s ongoing efforts to advance innovative solutions for the decarbonisation of its portfolio of gas plants, demonstrating that existing gas infrastructure can operate on a hydrogen blend to provide reliable, low carbon electricity to UK homes and businesses. More broadly, the trial shows a viable route for delivering on decarbonisation readiness obligations for peaker generation as part of the UK’s journey to net zero.
It is also a key milestone in HiiROC’s journey, demonstrating the effectiveness and affordability of HiiROC’s TPE process, which produces hydrogen without CO2 emissions, making it compliant with the UK’s Low Carbon Hydrogen Standard (LCHS). By leveraging the existing gas network and co-locating hydrogen production where it is needed, operators can decarbonise without costly new infrastructure.
Martin Scargill, Managing Director, Centrica Energy Storage +, said: “The success of this trial demonstrates the potential hydrogen has to reduce emissions and future proof flexible power generation such as our gas peaker plant at Brigg. As the UK looks to achieve its ambitious Clean Power 2030 targets, hydrogen has the potential to play a key whole system role in providing reliable, low carbon electricity to power UK homes and businesses when demand is at its highest.
"I am proud of the work Centrica does in supporting the development of exciting, innovative technologies right here on the Humber that can help transform energy generation in the future.”
Tim Davies, Chief Executive of HiiROC, added: "We are thrilled with the success of the injection trial. This achievement is a testament to the hard work of the joint team, and it brings us one step closer to delivering affordable, clean hydrogen, and provides a path to help achieve the UK’s ambitions for clean power in 2030 and beyond.”
Rebecca Allison, Chief Operating Officer at Net Zero Technology Centre, commented: “What was achieved at Brigg Energy Park represents a significant step towards industrial decarbonisation at scale. This UK-first trial proves what’s possible when industry collaborates to innovate. The success of this project reflects the skill and commitment of everyone involved and underscores the vital role hydrogen will play in delivering flexible, low-carbon energy.”