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A ground-breaking airside hydrogen refueling trial, led by , and supported by ���سԹϺ���һ���������� and cross-industry partners, has been successfully completed at  – the first airport trial of its kind at a major U.K. airport.

Hydrogen was used to refuel and power ground support equipment (GSE) – specifically, baggage tugs (or tractors) – servicing easyJet passenger aircraft. Conducted alongside the airline’s daily operations, the trial demonstrates that the gas can be safely and reliably used to refuel ground equipment in the busy, live airport environment.

The trial, dubbed Project Acorn, was under development for over a year and involved ���سԹϺ���һ���������� and many other leading organizations from across aviation, engineering, logistics and academia, including , ,  (CPC), , , the ,  and .

The group intends to use the outputs of the trial to help develop industry best practice standards, provide guidance to airports, airlines, local authorities and regulators on required infrastructure changes, and support the development of a regulatory framework for hydrogen’s use on an airfield – standards which, due to hydrogen’s nascency in aviation, do not currently exist.

The data and insights gathered will also feed into research that groups like Hydrogen in Aviation (HIA)* are conducting to ensure U.K. infrastructure, regulatory and policy changes keep pace with the technological developments in carbon-emission free flying. It also supports the work and ambitions of other bodies such as  (HSW) and the  (HII), the latter having also co-funded the project.

“It’s without doubt that hydrogen will be an important fuel of the future for short-haul aviation as demonstrated by the rate of innovation we’re seeing,” says easyJet Chief Operating Officer David Morgan. “While the technology is advancing at an exciting pace, as hydrogen isn’t used in commercial aviation today, there is currently no regulatory guidance in place on how it can and should be used and so trials like this are very important in building the safety case and providing critical data and insight to inform the development of the industry’s first regulatory framework. This will ensure regulation not only keeps at pace with innovation, but importantly also supports the industry in meeting its decarbonization targets by 2050.”

���سԹϺ���һ���������� is providing technical expertise and project management support and will be developing the insights and best practices for sharing with the industry later in the year.

���سԹϺ���һ���������� Senior Vice President Kate Kenny says: “Supporting this groundbreaking operational trial continues ���سԹϺ���һ����������’ strong track-record in industry-leading hydrogen aviation research projects, such as FlyZero and Zero Emission Flight Infrastructure. By investing in understanding the use of hydrogen in a live airport environment we hope to help move aviation an important step closer to decarbonization and a net-zero future.”

U.K. Aviation Minister Anthony Browne says: “Project Acorn is a great example of the U.K. aviation sector pushing the boundaries of what’s possible - using leading engineering to make decarbonization a reality from the ground operation to the planes themselves.”

“Projects such as this are cornerstones of our commitment to support innovation and decarbonization in the industry,” comments Civil Aviation Authority Director for Strategy, Policy and Communications Tim Johnson. “This trial will serve as the basis of a White Paper which we will also be contributing to, as well as allow for the creation of further safety guidance and regulatory standards for the use of hydrogen in aviation.”

Project Acorn - the seed to more rapid hydrogen growth in the U.K.

There is a compressed time window for the U.K.’s aviation industry to develop the ground infrastructure, safety standards (including how to use, control and transport hydrogen) and operational procedures needed to make the sector’s operations hydrogen ready. Project Acorn is designed to be a first step on this journey, with limited trials of GSE equipment accomplishing a key objective of receiving clearance for airside refueling from the Civil Aviation Authority (CAA) – the regulator playing an active role in the trial as an independent reviewer of the safety case.

The safety assessments and emergency planning with local authorities that serve Bristol Airport will also provide invaluable learnings for future developments and serve as a blueprint for other local authorities – providing them with the necessary skills and resources to assist airports in making the transition to hydrogen.

A shorter-term objective for this project is to lead to the long-term or permanent deployment of hydrogen GSE at Bristol Airport and readying the airport for trials and then commercial operations of hydrogen-fueled aircraft.