The latest BGS science briefing note focuses on the potential of hydrogen storage to support the UK energy transition towards net zero emissions. As renewable energy sources continue to grow, the importance of reliable energy storage solutions becomes paramount to balance supply and demand. Hydrogen, produced from renewables, is identified as a versatile energy carrier that can store excess power and decarbonize sectors like shipping and heavy industry. The briefing note discusses various underground storage technologies such as salt caverns, lined rock caverns, and depleted hydrocarbon fields as viable options for scalable and long-duration hydrogen storage. While these technologies have the potential for large-scale storage capacities, they require substantial initial investment and specific geological conditions. The UK, currently having low gas storage levels, faces the challenge of significantly increasing hydrogen storage capacity to meet net zero targets by 2050. The briefing note emphasizes the importance of closing knowledge gaps through demonstration projects, comprehensive planning, and research and development in hydrogen storage technologies. Dr. Tim Armitage, a BGS Geoscientist and the note's author, stresses the key role of hydrogen storage in stabilizing the grid and meeting climate targets. While acknowledging the promise of technology, he also highlights the need for substantial investment, research, and development to overcome technical, regulatory, and commercial challenges in deploying large-scale hydrogen storage. In conclusion, the successful integration of hydrogen storage is deemed crucial for achieving reliable energy supply and meeting climate goals in the UK. However, achieving this integration will require overcoming various challenges through concerted efforts in technology advancement and regulatory support.