A research project led by Wales and West Utilities (WWU) in the UK is delving into the historical shift from town gas to natural gas in the 1960s and 70s to glean insights for the country's transition to a clean energy system. The first phase of the research highlighted the successful and smooth nature of this conversion, prompting the initiation of the second phase that will delve deeper into the industrial and commercial aspects. This phase, supported by the Network Innovation Allowance and driven by input from the Department for Energy Security and Net Zero, aims to guide the future of the gas distribution network, especially focusing on difficult-to-decarbonize customers and the potential of hydrogen conversion. The project, undertaken by WSP in partnership with SGN, aims to provide crucial insights for the industry stakeholders to make informed decisions about the energy future of the UK. WWU's Chief Operating Officer emphasized the importance of learning from the past for a smooth future energy transition, highlighting the role of low carbon hydrogen in replacing natural gas. The ultimate goal is to ensure a cost-effective and least disruptive transition to a reliable energy system that meets the needs of industry, businesses, and consumers.