1. World energy outlook 2012;IEA,2012
2. UK energy firm stokes growing political row with price hike;Sandle;Reuters 10 Oct 2013,2013
3. Labour would freeze energy prices;BBC News;BBC News 24 Sept 2013,2013
4. Electricity capacity assessment report 2013;Ofgem,2013
5. UK future energy scenarios;National Grid,2012