Project TORCH (Tool for Optimising decisions for Recovery of sewer Catchment Heat) is an Ofwat Innovation Fund Water Breakthrough Challenge project led by Anglian Water, with Business Modelling Applications (BMA) as a key technology partner. TORCH is developing a decision-support tool to help water companies, local authority planning functions and delivery partners identify where wastewater heat recovery is feasible, affordable, and beneficial – while protecting wastewater network performance and managing risk. Wastewater contains a reliable source of thermal energy which is typically lost, yet can be recovered to support heat decarbonisation and the growth of district heat networks. TORCH addresses the real-world barriers resulting in limited deployment to date by considering uncertainty in heat availability, competing network constraints, cost and carbon trade-offs and the challenge of selecting the right recovery approach for different catchment conditions. This presentation will outline TORCH’s methodology and tool design, including how heat source locations, recovery technology options, and transmission routing can be prioritised to meet heat demand at lowest cost and carbon impact. We will also share how cross-sector collaboration is shaping scalable outputs that can accelerate wastewater heat recovery across the UK and beyond, to the benefit of all stakeholders.