I have also wondered this. The answer is probably here: http://www.etrto.org/Publications/Order/STANDARDS-MANUAL
Ta, not quite £160 curious though aha
@zigbit started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I have also wondered this. The answer is probably here: http://www.etrto.org/Publications/Order/STANDARDS-MANUAL