Briefs: London tube

The London Tube has air-conditioned trains at last. The first of 191 brand new walk-through air-conditioned trains came into service in August 2010 on the Metropolitan line. Roll-out should be complete on this line by 2011, by which time trains will also start being delivered on the Circle, Hammersmith and City Lines. The trains which are built by Bombardier Transportation will cost a total 1.7 billion €. There is to be one air-conditioning unit per car on the 7 or 8 trains. Each unit has a cooling capacity of 31 kW per unit. Power consumption in cooling mode is up to 16 kW in extreme conditions, but is more typically 13 kW.