I personally don't think UK knife laws are all that bad. You can carry a <= 3" blade, provided it folds. If it's non-folding, or if it's lockable, you count the full length. Most full-sized Leatherman blades are longer than this limit when unfolded and locked.
(You can carry bigger blades than this, provided they're legitimate to your work/activities and/or they're stored sensibly. If you're a tradesman with a multitool on his belt you're exceedingly unlikely to have any trouble. If you're at a football match, possession of a knife would be treated a lot more seriously)
I have often benefited from recommendations for Things I Didn't Know I Wanted.
Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.
Rules: