150 years of the Tube quiz
1 - what is the longest distance you can spend underground in one journey?
2 - how many mice are estimated to live in the underground system?
3 - which famous radio voice tells you to "mind the gap" on the Piccadilly Line?
4 - the name 'Viking' was proposed for which line?
5 - name three disused or 'ghost' stations where TV filming takes place?
6 - how far is it between the network's two nearest adjacent stations?
7 - in which direction, north, south, east or west, does the tube extend furthest?
8 - on which line is the deepest part of the underground?
9 - which station is the highest above sea level?
10 - in which year was the first escalator installed?
All the answers to the quiz questions can be found in our Tube facts updates from throughout the day.