All Tube Stations Have Fifteen Floors

A mention in the Tufnell Park video that I made last week caused some confusion ... how could 110 steps be the equivalent to a 15 storey building?
Ah! Yes, so I went out to explain a running gag that we have, involving London Underground stations and the signs that they have at siaircase which may not be entirely accurate ...
Music by Joakim Karud / joakimkarud