End-of-life tyre pyrolysis produces syngas streams that require complete combustion to meet stringent EU waste-incineration standards. The aim of this project was to design and validate an optimised thermal oxidiser capable of treating these off-gases at ≥850 °C for at least 2 s, thereby preventing release of incomplete combustion products. Using high-fidelity CFD combustion modelling, combined with Aspen Plus process simulations, our team evaluated chamber geometries and operating conditions. Design improvements such as reoriented burners, internal baffles, and an extended outlet duct were introduced to enhance mixing and eliminate cold pockets. These modifications ensured almost 100% compliance with regulatory time-at-temperature requirements. Circtec subsequently adopted our recommended configuration, constructing and operating the enhanced oxidiser. This marks a successful example of ManchesterCFD providing end-to-end support from computational analysis through to validated real-world implementation, helping the client deliver sustainable waste-to-resource technology at industrial scale.