Industry watchdog Ofgem has warned that energy bills are set to rise as Britain becomes more reliant on imports.
Pressure on supplies is increasing as coal power stations around Britain close earlier than expected.
The situation has left the UK more reliant on supplies from dangerous parts of the world.
ITV News Business Editor Laura Kuenssberg reports:
Our increasing reliance on gas leaves the UK more reliant on an energy supply from a very dangerous part of the world.
So what is behind the new urgency in the warnings about keeping the lights on?
The boss of energy regulator Ofgem has warned that the looming shutdown of several coal power plants will raise energy bills further.