I'd guess that the majority of assisted opening knives have locking blades. The site to which Norm linked states that locking blades are illegal to carry in public without good reason. The "good reason" part makes this a less than black and white legal topic, and only you can decide if the risk is worth taking.
You missed a rather critical point in your cut and paste Norm.30 seconds of Google and I found this
Banned in the UK
flick knives (also called ‘switchblades’ or ‘automatic knives’) - where the blade is hidden inside the handle and shoots out when a button is pressed
butterfly knives - where the blade is hidden inside a handle that splits in two around it, like wings; the handles swing around the blade to open or close it
disguised knives, eg where the blade is hidden inside a belt buckle or fake mobile phone
samurai swords (with some exceptions, including antiques and swords made to traditional methods before 1954)
hand or foot-claws
hollow kubotan (cylinder-shaped keychain) holding spikes
shuriken (also known as ‘death stars’ or ‘throwing stars’)
kusari-gama (sickle attached to a rope, cord or wire)
kyoketsu-shoge (hook-knife attached to a rope, cord or wire)
kusari (weight attached to a rope, cord or wire)
This is not a complete list of banned knives. Contact your local police to check if a knife is illegal.
You missed a rather critical point in your cut and paste Norm.
[h=2]Banned knives[/h]There is a ban on the sale of some knives:
The list you copied is about selling such knives, not owning them.
Strange that you say that, the overall heading is :Buying and carrying knives: the law obviously if a knife is banned from sale that also means banned from owning, their cutting it off at the source.
You will find a lot of discussion about this in British Blades Forum.
The bottom line is that although assisted knives are not illegal in the UK by the 'letter of the law', they are certainly would be based on the 'intent of the law' (designed to cover easily deployable and concealable knives) and would be if the law were to be updated. This would most likely also include 'flippers' and possibly even all one handed openers.
This makes them an EXTREMELY grey area and one where you won't want to push things too far. Owned and kept on private property should be fine, but taking one out (even when there is good reason) would be very dodgy.
Assisted knives are currently available to buy in the UK so that might be the safest approach. You can also effectively disable the assisted aspect by tightening the blade pivot. Customs officers may only inspect and item, not modify it or undo any screws/bolts. You have no need to declare the item unless its value is above the allowed amount.
I've imported several assisted knives into the UK and only had one seized. Perhaps unsurprisingly it was a "Schrade Extreme Out The Front Assisted Open Pocket Knife" (google it), however if you are questioning if assisted knives are OK, this is also not illegal by the letter of the law, but would you say it was OK for the UK?
Grey, GRey, GREY!!!
My understanding of the UK knife law (which is ridiculous btw like the gun law and I'm from there) is that you cannot carry a locking blade period. It doesn't matter how it opens.
As for bringing one back, you're from the UK so you'll go through the faster queue for customs. If you feel the risk of packing it inside your suitcase and not declaring it, is yours to choose. I certainly wouldn't tell customs and you might as well just give the office 50 quid.
According to my knowledge its illegal to carry even an assisted opening knife with you. If you got lucky then take it to home otherwise you can lose it somehow.I'd guess that the majority of assisted opening knives have locking blades. The site to which Norm linked states that locking blades are illegal to carry in public without good reason. The "good reason" part makes this a less than black and white legal topic, and only you can decide if the risk is worth taking.
According to my knowledge its illegal to carry even an assisted opening knife with you. If you got lucky then take it to home otherwise you can lose it somehow.
As has been said many times, in the UK, 'assisted knives' are a grey area. The letter of the law would say they are OK, but the spirit of the law would ban them. It has yet to be proven in court. There is a lot of debate amongst users, all of which is pretty useless as unless there is a court case we will never know for sure. Right now, they are on sale freely on popular UK websites.
Assisted knives will be locking knives from their very nature, and locking knives can be legally carried in public places in the UK with 'good reason' and walking in the countryside can be 'good reason' enough. Walking around in town - No.
Here is my Spyderco PITS review on CPF -
But there are LOADS of UK EDC legal knife options, the SPITS is quite expensive and so not or everyone.
It is my understanding that even locking blades are generally illegal there.