Vodafone has worked with facilities management firm Mitie to reduce its UK carbon footprint by 25,000 tonnes over a three-year period, with improvements to building-based energy use saving the technology firm around £10m. By working with Mitie, Vodafone UK has saved 100GW of energy over the three-year period which is equivalent to powering the homes of 65,000 people for a year. The organisation has also saved around £10m in energy-related costs as a result.