A non-locking pen knife with a blade no longer than 3 inches is allowed to be carried in public in the UK, provided it is not used in a threatening way. No other type of knife may be legally carried in public in the UK, except where there is a good reason for having the knife. Note: Information given as a general guide only. Further information: www.direct.gov.uk Britishblades.com 'Blades, Britain & The Law'