The National Physical Laboratory (NPL) in the UK has published a report addressing essential challenges in advancing the hydrogen economy to aid the country in meeting its net zero objectives. The UK government's commitment of up to £500 million for green hydrogen over the parliament period aims to facilitate the transition to clean energy by 2030. However, the report emphasizes the necessity for hydrogen to be produced at scale, economically, and with minimal environmental impact to effectively contribute to a net zero society. NPL, as the UK's National Metrology Institute, stresses the critical role of metrology in ensuring the standardization and success of hydrogen technologies. The focus lies on supporting operations, standardization, and innovations across the hydrogen economy, particularly in areas like gas quality measurements for hydrogen fuel cells and electrolysers. The report identifies key challenges in production, storage, distribution, and end-use of hydrogen, highlighting the importance of addressing these hurdles to accelerate the hydrogen economy. These challenges include cost reduction in electrolytic or 'green' hydrogen production, the expansion of storage and distribution infrastructure, the development of advanced material research capabilities, and the establishment of regulatory and technical standards throughout the hydrogen value chain. NPL underlines its readiness to collaborate with government, industry, and academia to tackle the identified needs and challenges, aiming to propel hydrogen technologies forward as a commercially viable energy source that significantly contributes to the UK's energy transition.