In every way, Mr Brown’s boast was fantasy. There is no way we could hope to install two giant £4 million offshore turbines every day between now and 2020, let alone that they could meet more than a fraction of our electricity needs. But the cost of whatever does get built will be paid by all of us through our already soaring electricity bills – which a new study last week predicted will quadruple during this decade to an average of £5,000 a year. This would drive well over half the households in Britain into “fuel poverty”, defined as those forced to spend more than 10 per cent of their income on energy.