At the HS2 Victoria Road Crossover Box construction site in West London, white shipping containers powered by hydrogen fuel cells are providing emissions-free electric power. This marks a significant shift towards sustainability in the UK's construction industry. GeoPura, a clean energy company based in Newcastle, supplies hydrogen power units (HPUs) to various sites, including HS2 locations in Aylesbury. The company plans to expand its fleet of HPUs to 3,600 by 2033, supported by recent funding of $71 million. GeoPura also produces green hydrogen at sites across the UK to meet the growing demand for clean energy solutions. Other players in the HPU landscape, like EODev and AFC Energy, are making strides in deploying hydrogen technology in different sectors. Despite challenges such as fuel availability and costs, the interest in hydrogen fuel cells is on the rise. OEMs like Hitachi Energy and Caterpillar are partnering with hydrogen technology companies to develop innovative solutions like hydrogen fuel cell gen-sets and backup power for data centers. While the industry faces hurdles in scaling up due to uncertainties in the market size and fuel availability, efforts are being made to address these challenges. The cost comparison between running diesel generators and hydrogen fuel cells is a factor considered by contractors, reflecting the delicate balance between sustainability and economic feasibility. Nonetheless, the positive momentum towards adopting hydrogen fuel cells for cleaner construction practices indicates a promising future for sustainable energy in the UK.