The coolest of Tube trains?
As anybody who has traveled on the tube in the summer will testify, the addition of air cooling systems was of paramount importance. At the moment, only the Metropolitan and District line trains have air conditioning; the new design will enable cool air to be extended to the deeper lines.
Much effort was applied to employing the most lightweight materials available, enabling the new cooling systems to fit neatly behind the walls.
"The new Tube for London will take the city into the future by enriching the everyday journey of its passengers," says Priestman. "It was a privilege to design something so iconic and long-lasting