(Fibre sizes from http://www.carnicom.com/micro2.htm)
External link Conversion Calculator for Units of LENGTH (http://www.ex.ac.uk/cimt/dictunit/ccleng.htm)
... station[?] North End tube station[?] (aka Bull & Bush; never opened) North Weald tube station[?] Ongar tube station[?] St Mary's (Whitechapel Road) tube ...