One of the bolder claims set out in the energy White Paper was the stated ambition to achieve 20 per cent. of Britain's electricity sources from renewable energy by the year 2020, though it was not clear whether that was a commitment, a target or an aspiration. However, in recent weeks the Minister for Energy and Construction has indicated that if the Government do not look as though they are on target to achieve this, whatever it is, the situation will have to be reviewed. On a scale of nought to 10, how confident is the right hon. Lady that she can achieve this aspiration?