Since we have no (current or foreseeable) intention of trading under this name, the trademarkability of any name is surely a moot point.

Even if not protected by trademark, should someone start trading under that name, in a way that is detrimental to us, we should still be protected by the common law concept of "passing off" (NB IANAL) 

Therefore I would be in favour of "Wiki UK"

James Hardy
MrWeeble

2008/10/13 Thomas Dalton <thomas.dalton@gmail.com>
2008/10/13 Tom Holden <thomas.holden@gmail.com>:
> Well wUKi sounds rather like wookie, which is almost certainly already
> trademarked...

Trademarks only apply to a specific context, so I doubt that's an issue.