The report delves into the potential of electrolytic hydrogen production in mitigating the impact of thermal constraints on the UK electricity transmission network. With a shift towards cleaner energy systems, the UK is grappling with challenges related to the transmission of renewable energy from the North to the higher-demand South. During peak production periods, the excess power flow towards the South can surpass the grid's thermal limits, necessitating the curtailment of renewable energy and the deployment of fossil fuel sources. To address this issue, hydrogen production facilities present a promising solution. By converting surplus renewable electricity into hydrogen, these facilities can alleviate regional thermal constraints, thereby preventing the need for constraint payments and supporting the integration of renewable energy. The produced hydrogen, regarded as a low-carbon fuel, can be utilized across various sectors like industry, heating, and transportation, playing a vital role in the UK's decarbonization efforts. The collaboration between the National Grid Electricity System Operator, National Gas Transmission, and Arup underscores a strategic approach to explore the technical, commercial, and economic feasibility of electrolytic hydrogen production. This initiative not only aims to optimize the management of thermal constraints but also paves the way for a more sustainable energy landscape in the UK.