Thanks everyone. Youve all been a great help. I think I have my choice down to a spyderco sqeak and perhaps at times the ukpk. its a real shame spyderco don't do a dragonfly 2 salt in a slipit mode. That would of been perfect. Thanks all again. Great forum and site. Will be using it a lot in future.
Nicknohair over on BritishBlades does an excellent conversion very cheaply. If that's the knife you really want, I can put you in touch with him.
Also, here's a teaser. You know, just in case one knife isn't enough
http://www.heinnie.com/knives-and-tools/folding-blade-knives/f/uk_friendly_carry/yes