A key driver in the leveraging of private sector investment has been the alignment of decarbonisation works with scheduled Planned Preventative Maintenance (PPM) or Lifecycle Maintenance (LCM) obligations. However, while this represented a majority of such initiatives, this was not always the case and some initiatives were introduced without the presence of a business as usual or contractual driver. The review highlighted that typically the drivers for introducing improvements were the improvement of energy efficiency/carbon footprint and to reduce energy expenditure. These factors were consistent across public Authority, Project Co and FM provider responses, aligning with wider construction industry sentiment to reduce the carbon footprint of infrastructure projects.