A number of stakeholders identified the implications of contractual energy mechanisms on successful outcomes as a real challenge and a potential risk to success. This was more prevalent where a significant proportion of the funding is derived from either public or private sector, but the energy mechanism realises significant savings/benefit to the other party. Where this is the case consideration should be given to discussing the contractual process at an early stage to reach agreement on who will take benefit and, if necessary, provide suitable drafting to reflect this within any supplementary agreement.