In 2021 researchers from the Tyndall Centre for Climate Change Research developed a decarbonisation roadmap for the live music sector (Super Low Carbon Live Music Roadmap). This roadmap set targets for different sources of greenhouse gas emissions (GHGs) associated with putting on live events that align with the scale and urgency of meeting the United Nations Paris Agreement on Climate Change. Many of the goals were set to deliver action within the ‘critical decade’ (the 2020s) identified by the Intergovernmental Panel on Climate Change (IPCC). Therefore, milestones in 2025 as well as longer term targets were set. In August 2024, Act 1.5 delivered their Bristol Downs one day festival, implementing strategies for reaching these goals. Massive Attack headlined the festival with DJ Milo, Sam Morton, Lankum, Killer Mike on the bill for the day. This report is a critical evaluation of the progress demonstrated at this show and further learning for future events.