SMEs are increasingly seeing the need to understand, calculate and manage their impact on the environment and begin their journey to net zero. Facing pressure from customers and suppliers, businesses must demonstrate active efforts in reducing emissions and minimising their carbon footprint. Carbon reduction has become an essential component of all good business planning. Measuring and lowering emissions is now a key metric of sustainable business success. Under guidelines such as the Government's policy notice PPN06/21, which targets the public sector, suppliers involved in public contracts must comply with robust environmental standards and contribute to broader sustainability goals, making a carbon audit a significant consideration for those tendering for public sector opportunities.