I would like us to invest in renewables, because I think that it is important, but I take a slightly different view of the prognosis for how long we will require gas both for heating and for electricity generation. In relation to our indigenous gas supply from the North sea, the hon. Lady will know as well as I do that the extent to which we rely on imports has changed massively in the past 10 years. The trajectory is going one way. If it is possible to extract shale gas safely, and if it is properly regulated and monitored, we may have the benefit of being able to replace some of what we import with indigenous supply. We should not close our minds to that or seek to block it.
I would like to make a slightly different point to the other extreme. I have been listening to the right hon. Member for Hitchin and Harpenden (Mr Lilley) responding to other speeches from a sedentary position. He has said a number of times to Members with constituency interests in the issue that it is about showing leadership. With all due respect, leadership is not about hysterical hectoring; it is about ensuring that the approach is evidence-based and that all the arguments can be properly, systematically and fundamentally dealt with, so that people can see exactly what the level of risk is.