"Neither a bow, nor its arrows are offensive weapons under law unless an individual adapted them or intended to use them for the specific purpose of to causing harm to other persons.
This is because modern sporting and hunting bows and arrows are not 'made' offensive weapons, as they are designed to shoot targets or game, not persons.
The burden would fall on the police to prove that you intended or had adapted the bow and arrows for the purpose of causing harm to other persons.
However, the arrows themselves (not the bow), when carried in a public place or on school premises, would fall under Pointed and Bladed Articles offences (Section 139, Criminal Justice Act, 1988).
In this case, the burden would fall on the individual carrying the arrows to convince the police that he or she had 'good reason' to have them at the time: for example, if the carrier was on their way to a practice area or to hunt. Ultimately a court would have to be convinced beyond reasonable doubt that the individual did not have a 'good reason', for that individual to be convicted of the offence.
[h=3]Source(s):[/h]Section 139, Criminal Justice Act, 1988"