Orr met first with staff at Tube Lines Westferry Circus headquarters accompanied by president's apprentice Hayley Gryc, ICE London chair Robert Freer and regional director Jacki Bell. The party then moved on to the control centre, meeting people responsible for responding to calls about defects or problems on the Northern, Piccadilly and Jubilee lines.
At 2am the president was treated to a display of track replacement at Wood Green, where much of the tunnel and track remains from its construction in 1902. These multi-million pound maintenance and refurbishment works are only able to be carried out during a 3.5-hour window per night.
Afterwards the President said: "These workers are the unsung heroes of London's transport system, working every night to ensure that London can move during the day. Their skills and professionalism are an inspiration to all those involved in delivering infrastructure in cities across the world."