Not meaning to be "THAT GUY" but:
Section 141 of the Criminal Justice Act 1988 and the Criminal Justice Act 1988 (Offensive Weapons) Order 1988 makes it an offence to manufacture, sell or hire or offer for sale or hire, or expose or have in possession for the purpose of sale or hire or lend or give to any person any of the following weapons [7]:
Balisong or butterfly knife
Knuckleduster
Telescopic truncheon
Push dagger
Shuriken, shaken, or death star
Handclaw
Footclaw
Manrikgusari or kusari (rope, cord, wire or chain fastened at each end to a hard weight or hand grip)
Swordstick
Hollow kubotan (cylindrical container containing a number of sharp spikes)
Blowpipe or blowgun
Kusari gama (rope, cord, wire or chain fastened at one end to a sickle)
Kyoketsu shoge (rope, cord, wire or chain fastened at one end to a hooked knife)
Belt buckle knife
3. The Schedule to the Criminal Justice Act 1988 (Offensive Weapons) Order 1988[2], which specifies offensive weapons for the purposes of section 141 of the Criminal Justice Act 1988, shall be amended by the insertion into paragraph 1 of that Schedule after sub-paragraph (n) the words -
" (o) a disguised knife, that is any knife which has a concealed blade or concealed sharp point and is designed to appear to be an everyday object of a kind commonly carried on the person or in a handbag, briefcase, or other hand luggage (such as a comb, brush, writing instrument, cigarette lighter, key, lipstick or telephone).".