"To provide an overview of the drivers used to project sectoral demand in the South African Long Term Mitigation Scenarios (LTMS) and in so doing provide guidance to modellers embarking on similar processes. Consideration is given to the method used by the LTMS to develop these drivers, and how inconsistencies can arise when different drivers are used for different sectors. The briefing offers an alternative hybrid approach to combat inconsistencies through the use of both a top-down and bottom-up model."