KEYFACT Energy
It is easy to forget that not all that long ago, Britain was one of the world’s biggest oil producers.
Back in 1986, this country was the fifth biggest crude producer in the world, just behind Mexico and above Iran and Iraq. Even as recently as the turn of the millennium, the UK was still in the top ten.
But many assume that the North Sea is essentially finished.
Sky's Ed Conway analyses this debate.
KeyFacts Energy news: North Sea Focus