October’s energy battle between government departments is over, and while the final month’s statistics have not yet been revealed, the Department of Work and Pensions was on Friday sitting on top of the league table.

The competition was launched by David Cameron to add weight to his assertion that his would be “the greenest government ever”. Each Whitehall department had its energy use recorded last month to see how it would compare with September.

And it seems it is the DWP that has made the greatest strides in cutting its energy consumption, slashing September’s figure by 19%, almost three times the reduction of the department in second place, Business, Innovation and Skills, which cut its usage by 7%. In third place on Friday was the Foreign and Commonwealth Office with a 6% drop.

The Department of Energy and Climate Change, which one would hope knows a thing or two about energy savings, was at number five, having cut consumption by 4%.

Meanwhile, the departments in the energy relegation zone were, at the bottom, the Department of Health, with an unhealthy 16% increase in energy use, Culture, Media and Sport with a 12% rise, and Mr Cameron’s own Number 10 office, with, appropriately, a 10% hike in consumption.

The energy contest also included weekend figures, so the Halloween numbers have yet to be included in the monthly tally, which will alter the final league table.

Watch this space for the final figures and comments from the winning – and losing – departments.