We’ve developed the CGEN+ model of Britain’s energy supply and transmission system. We used CGEN+ to analyse infrastructure investment needs for alternative energy supply strategies, including least-cost (MPI) strategies, with and without a carbon price, which involve an increasing proportion of gas generation.

A significant increase in electricity demand, including from the electrification of heat and transport, could be provided by a variety of supply technologies, including fossil fuel power plants with carbon capture and storage (CCS), offshore wind with gas backup capacity, or nuclear power plants. These alternatives have very different implications for investment costs and carbon emissions.