Guardian: Since oil and gas are costly to produce and much in demand, it makes sense that they are expensive to use. Given the additional cost to Britain of dependency on unreliable energy-exporting regimes and the cost to the world of climate change it is also, arguably, no bad thing if high prices encourage people to be frugal with fuel. But that is no consolation to those who struggle to pay for even modest energy consumption. It is the poorest in society who suffer most when heating bills …