Previous analysis indicates that in the absence of active policy or changed market design the risk/return profile of energy markets could deteriorate substantially as a result of decarbonisation, reducing the propensity of companies to invest (Blyth et.al, 2016). Following a rapid evidence review undertaken with the TPA activity, this project will work closely with practitioners to explore how different commercial and regulatory models might affect perceptions of risk, cost of capital and appetite for investment under uncertainty.