Average daily ridership taken as a daily average of yearly ridership (1073 million) divided by 364 (an average year minus Christmas Day). Yearly figure according to ""Key facts". Transport for London. Archived from the original on 2007-05-29. Retrieved 2009-02-09.
Average daily ridership taken as a daily average of yearly ridership (1073 million) divided by 364 (an average year minus Christmas Day). Yearly figure according to ""Key facts". Transport for London. Archived from the original on 2007-05-29. Retrieved 2009-02-09.