Very neat design, but unfortunately not EDC (Every Day Carry) in the UK, due to the liner lock on the blade.
i.e. it’s not a slipjoint design, so needs a valid reason to carry outside the home, though perfectly legal to own.
The full size version is available through HH at a reasonable(ish) price, which is better than trying a personal import, as UK customs are prone to confiscating knives, even though they may not be prohibited.

https://heinnie.com/craighill-sidewinder-folding-knife/

Bill

Vic

The sidewinder is inherently locking because the blade can only move if the two parts of the handle separate. So if the body is held together it must latch together. Arguable whether that counts as a safety thing, I’ve had normal sprung blade knives fold over on me a time or three, or a lock. Depends whether the rules say separate latching mechanism or simple positive hold when in use.

Much easier on the fingernails when it comes to opening than the usual spring held style.

Clive

Dispite having a parallel link at each end of the handle I think it would look to much like a butterfly knife  to most law enforcement. The fast oprening action is very similar to a flick knife too. I would not want to be the person who got to test that in court.

Robert