Ofgem's Ian Marlee
Media playback is unsupported on your device

Power shortage risks by 2015, Ofgem warns

5 October 2012 Last updated at 13:42 BST

Britain risks running out of energy generating capacity in the winter of 2015-16, according to the energy regulator Ofgem.

Its report predicted that the amount of spare capacity could fall from 14% now to only 4% in three years.

Ofgem's Ian Marlee told BBC News that the report is a "warning light" and reforms of the energy production sector were needed.