We are looking at every aspect of our energy consumption. Power usage was a key factor in the choice of the equipment for our new 21st century network, for example, and our new data centres are being designed to use 60 per cent less power than their predecessors.
Fresh air is now used for cooling and everything is run from centrally-generated DC power supplies, eliminating the waste that results when each unit must generate what it needs from a mains supply.
