Stylised london map with cycle routes

This looks good shoots is it based on the OSM or OCM (Open Cycle Map)?
How far South West does it go? I know the Stanford giant London one stops just before my house (colliers wood)

The parameters are detailed on the site.

by the way, the code doesn't work :-)

You're a little quick off the mark.
The fella who's designed and printed it will enable the working code as of about now.

They really are beautiful pieces.