The evidence for supporting decarbonisation in the power sector was based on MARKAL analysis which informed the Fourth Carbon Budget report by the Committee on Climate Change (CCC). The MARKAL analysis looked at cost effective paths to decarbonisation to 2050 and concluded the following in relation to the power sector: (i) the quantity of low-carbon electricity required by 2050 (e.g. a possible doubling of supply) implies high rates of low-carbon capacity addition throughout the period to 2050, and therefore implies low-carbon generation by 2030 at a level close to total electricity generation today; (ii) the costs of reducing carbon-intensity in the power sector are generally lower than doing so in other sectors, and the least-cost path towards 2050 is therefore likely to involve early decarbonisation of electricity supply.DECCs Carbon Plan report, published in December 2011, set out the Government's view that deep cuts in emissions from the power sector will be required during the 2020s to keep the UK on a cost-effective path to its 2050 goal. The actions outlined in the plan, including the Government's reforms of the electricity market and work to address technology-specific barriers to deployment, will drive the huge increase in investment in low-carbon generation that will enable these cuts to be realised.The CCCs Fourth Carbon Budget Report can be found at the following weblink:"http://www.theccc.org.uk/reports/fourth-carbon-budget"DECCs Carbon Plan report can be found at the following weblink:"http://www.decc.gov.uk/en/content/cms/tackling/carbon_plan/carbon_plan.aspx"