Penknives are allowed to be carried without needing a justification in the UK. > It’s illegal to [...] carry a knife in public without good reason, unless it h

Penknives are allowed to be carried without needing a justification in the UK. > It’s illegal to [...] carry a knife in public without good reason, unless it has a folding blade with a cutting edge 3 inches long or less [0] It also cannot be locking to not need a good reason to carry it. This is set in case law not the text of the relevant laws (and could could also probably be overturned if anyone had the time, money and inclination to challenge it). [0] https://www.gov.uk/buying-carrying-knives https://www.gov.uk/buying-carrying-knives