Is it legal to carry any kind of weapon in the UK? Concealed or otherwise is it legal for a private citizen to carry any kind of weapon for self defence purposes in the UK?
JeffUK has quoted the relevant law. However the question then becomes "what is an 'offensive weapon'", and "what is a lawful excuse?". Almost anything can be classified as an offensive weapon if you can use it as a weapon. See https://www.askthe.police.uk/content/Q338.htm A lawful excuse is something like "I am going to play baseball, which is why I have a baseball bat". It is emphatically not "I want it for self defence". Specifically, https://www.cps.gov.uk/legal-guidance/offensive-weapons-knives-bladed-and-pointed-articles cites Patterson v Block [1984] 81 LSG 2458 – carrying a weapon for defence can still amount to intent to cause injury So the answer to the OP's original question: Is it legal for a private citizen to carry any kind of weapon for self defence purposes in the UK? is "No".
An obvious example would be a contract that gives possession of something to someone else. It's normally legal to use some reasonable amount of force to protect or prevent trespasses against property you own, but if you give possession of that property to someone else you can lose that right. For example, you can use force remove a guest who refuses to leave real property you own, but can't use force to remove a tenant even if they broke the terms of your contract. In most jurisdictions you'd need to get a court order and have the police use force if necessary remove the tenant.
The relevant regulations in 49 CFR 1540 refer to weapons, not firearms, and unless you are specifically permitted, you cannot carry a weapon in your carry-on luggage. The interpretation of &quot;weapon&quot; is given here, which says Weapons are objects that may be used to attack another. TSA considers an item to be a weapon under 49 CFR 1540.111 if it is created for use as a weapon or is so similar to an item created as a weapon that it appears to be, or is easily used as, a weapon. Weapons include firearms, as well as realistic replicas of firearms that may reasonably be thought to be actual weapons. Such realistic replicas are prohibited because their similarity in appearance to real weapons may allow them to be used to intimidate passengers and flight crew. The screener has the discretion to determine when a replica is so realistic that it should be prohibited. Other toy weapons will be allowed in the sterile areas and cabin. Partial weapons and parts of weapons also are prohibited because they may be carried separately by collaborators for assembly subsequent to entry or boarding. In addition, partial weapons may appear to be operative and could be used to intimidate passengers and flight crew.
There are many regulations to consider, for the firearms themselves, the permits needed by potential customers, and licensing you will need as a business dealing with firearms and ammunition. Start with the Home Office: https://www.gov.uk/search?q=firearms I.e., https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/479794/Guidance_on_Firearms_Licensing_Law_Nov_2015_v16.pdf
Was or is possession of screwdriver illegal in the UK? Yes, if the screwdriver's intended purpose is for a criminal act. There's not enough detail in the article, but the most likely scenarios are: Offensive Weapon, contrary to section 1 Prevention of Crime Act 1953: (1)Any person who without lawful authority or reasonable excuse, the proof whereof shall lie on him, has with him in any public place any offensive weapon shall be guilty of an offence ... [...] (4)In this section “ public place ” includes any highway, or in Scotland any road within the meaning of the Roads (Scotland) Act 1984 and any other premises or place to which at the material time the public have or are permitted to have access, whether on payment or otherwise; and &quot;offensive weapon” means any article made or adapted for use for causing injury to the person, or intended by the person having it with him for such use by him or by some other person. Going Equipped to steal, contrary to section 25 Theft Act 1968: (1)A person shall be guilty of an offence if, when not at his place of abode, he has with him any article for use in the course of or in connection with any burglary or theft. (2)A person guilty of an offence under this section shall on conviction on indictment be liable to imprisonment for a term not exceeding three years. (3)Where a person is charged with an offence under this section, proof that he had with him any article made or adapted for use in committing a burglary or theft shall be evidence that he had it with him for such use. [...] (5)For purposes of this section an offence under section 12(1) of this Act of taking a conveyance shall be treated as theft. Possession with intent to destroy or damage property, contrary to section 3 Criminal Damage Act 1971: A person who has anything in his custody or under his control intending without lawful excuse to use it or cause or permit another to use it— (a)to destroy or damage any property belonging to some other person; or (b)to destroy or damage his own or the user’s property in a way which he knows is likely to endanger the life of some other person; shall be guilty of an offence. [with a maximum sentence of 10 years] NB in this jurisdiction, possession of a weapon for self-protection is not, except in some very narrow circumstances, a reasonable excuse to carrying one.
There is, as far as I can see, no legal definition of picnic in England and Wales. In the absence of such, the convention applied by the UK courts is to use the normal meaning of the word; usually by reference to the Oxford English Dictionary (which is behind a paywall so I've used its free online version here)... An occasion when a packed meal is eaten outdoors, especially during an outing to the countryside. (My emphasis)
Firstly, your "apartment" doesn't prohibit anything; Your tenancy contract does. A terminology nitpick, but one that can shed some light on what is actually happening. TLDR: Your right to bear arms isn't being infringed, its being traded away. An unreasonable trade may be invalidated by the courts. Firearms restrictions are far less likely to be voided than speech content limitations. Yes, you have the right to bear arms(whatever exact meaning of that is). You also have the right to voluntarily agree to a binding agreement limiting that right, in exchange for a consideration. Compare a Non-Disclosure Agreement (NDA). You have the right to freedom in your speech: you also have the right to agree to binding limits on your freedom of speech, in return for consideration (such as money or access to information). Every contract is structured in the same general way: Party A agrees to do or avoid doing certain things, in exchange for Party B agreeing to do or avoid doing certain things. So, in essence, what the apartment contract says is, that you agree to do or not do some things (including paying rent), in return for your landlord temporarily granting you some rights(such as the right to reside(generally exclusive), the right to control the space, etc. ), and imposing some obligations on themselves (which vary from place to place). In your case, one of the things that you are trading is a limitation on your right to bear arms(note that you can still bear arms, just not on the property in question). Now one thing to note is that courts have the power to enforce contracts; they also have the power to void contracts, in part or in full, if they are illegal or "unconscionable". In general, restricting (the content of) speech is not reasonable (e.g. having a general noise level restriction is reasonable), so is more likely to be struck down than one restricting firearms on the rented property.
Let's put to bed the myth of privacy that is at the heart of your question: in R v Sotheren (2001) NSWSC 204 Justice Dowd said “A person, in our society, does not have a right not to be photographed" So they can ask you to stop; its bad manners if you don't but it is not illegal. If they are the controller of the property then they can stop you filming from their property but they cannot stop you filming into their property from outside (either public land or land where you do have permission). See How do laws affect photography of non-humans in public when people may be in the frame?