In the early hours of 12 September 2015, TfL will launch a night time Tube service. The Night Tube will support London's 24-hour lifestyle by offering a round-the-clock service on Fridays and Saturdays, on five lines: the Jubilee, Victoria, and most of the Central, Northern and Piccadilly lines.
The London Transport Museum has produced a pre-printed run of this 'Fly the Tube' poster from the 1960s to celebrate the occasion.
The text reads:
"Take the Piccadilly Line to Heathrow Airport. It's the only way to fly"