@Stew,
That page you posted looks a lot like the old info, before they started talking about blanket bans. If so, while more clearly laid out, it might not be current on what can be sent and how within the UK. Past experiences suggest it takes at least 6 month for RM to get all its info pages aligned when they make policy changes.
In any event, I don’t think it is really up to any of us to tell anyone they cannot send a knife internationally with RM if they want to try. The whole topic is getting a bit
. No one here is responsible for enforcing RM rules, nor responsible for anyone else if they disagree with advice offered.
@Every_Cloud
Best of luck. Just remember that even if your test case pocket knives arrive in Texas, all it proves is that it was possible, when you send, that they can go through. Statistically a sample of one proves little, dice have no memory, and past success could be down to a policy that allows, or someone not yet following policy that does not allow.
A lot like the game of roulette that it used to be with Mount Doom (Pleasant) Customs inspectors who confiscated liner locks as “gravity knives” if some combination of wild gyrations and arm flailing could get the blade to open. One day it started, one day it stopped, all down to some supervisor’s interpretation of law.