Business Green: Whitehall officials have today denied reports that business secretary Lord Mandelson and energy and climate change secretary Ed Miliband are engaged in a turf war over UK energy policy. However, industry insiders insist tensions remain between the two ministers’ departments, following the launch of a new “energy and climate change unit”. The unit has reportedly been set up within Lord Mandelson’s Department for Business, Enterprise and Regulatory Reform (BERR) to lobby the …