27 June 2013 Last updated at 06:57 ET
The danger of power shortages in the UK by the middle of the decade has risen, according to industry regulator Ofgem.
Spare power production capacity could fall as low as 2% in two years' time, increasing the risk of blackouts.
More investment in power generation and other preventative action is needed to protect consumers, Ofgem said.
"Ofgem's analysis indicates a faster than anticipated tightening of electricity margins toward the middle of this decade," it said in a report.
Source: BBC News - Business http://www.bbc.co.uk/news/business-23081695#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
