I had some Q Acoustic Concept 20’s a while back, they were great. Only got rid as I wanted something less modern looking when I moved to different house.
I don’t really know TBH. It’s says UK legal on the Heinnie site. I don’t carry it, or any other type of knife around with me - It lives in my workshop, so haven’t put much thought into it.
I got a Boker Rockstub for work use a few weeks back. Would recommend. The slide lock mechanism is super handy for single handed opening/closing. It looks massive in the in hand photo on the website for some reason, but is quite small in reality.