We've debated before whether WMUK should be supporting projects beyond the Wikimedia set of projects, and the answer has always been a resounding "yes". The WMUK constitution sets its charitable objects as "for the benefit of the public, to promote and support the widest possible public access to, use of and contribution to Open Content of an encyclopaedic or educational nature or of similar utility to the general public, in particular the Open Content supported and provided by the Wikimedia Foundation."
There's no doubt that OSM fits that bill and I hope that WMUK will find some resources to enable the attendance of some members at the Scotland conference.
--
Rexx