I've been on trains all the time. I don't think I have been on any more than one plane during this campaign time, I have been going around by trains. And I think actually our high-speed rail network will allow people to get off the roads and also to get off domestic air flights, and I think that's incredibly important. I would say the other thing I have done, and I'm very pleased we've managed to do this in our home in North Queensferry, we thought living on a hill with a huge amount of wind, not very good weather in Scotland, as you know, that a wind turbine would be the answer. In fact, we found, far better, even in this area where there's not much sun is a solar panel. I would recommend people if they can to use this form of energy because it allows us to heat our water in a way that is far more environmentally friendly. Weve got the first Climate Change Act in the world, we are due to reduce emissions substantially by 2020 and 2030, there is a lot more to be done both individually and as a community. But we've also got to get a world agreement, we've got to work, David, with Europe to do so and work with the rest of the world, and that's the way to get environmental emissions down.

If we are going to make a real difference, we've GOT to change the energy balance in our country. We've got to remove this fixation about using oil, our addiction to oil, our dependence on oil. That is why our energy plan talks about how we can move with nuclear and renewables and oil and gas. We want 15% renewables by 2020, with the world's leading offshore wind power at the moment, and we want to do more in every area of renewables. The question I have to ask the two other parties is this, why, Nick, are you so against nuclear power, because it is the means to balance off our energy supply, without having the dependence on oil. And David, why don't you have a renewables target as we do, so that we can use wind power? Why are you so against the on-shore wind that power people are trying to develop? You seem to support it in principle but in every constituency where it happens, you seem to be against it. Let's get real also about getting this energy balance right.