In Scotland, it is an offence to carry an article with a blade or point in a public place. There are only three exceptions that allows one to carry such articles:
for use at work;
for religious reasons; and,
as part of any national costume.
So if you're between jobs as a carpet fitter, are a Sikh, or a bagpiper wearing highland dress, you'll be ok. Carrying a knife for any other purpose is illegal. So yes, Snug, you would in Scotland in all liklihood be a criminal.
http://www.opsi.gov.uk/acts/acts1993/Ukpga_199 30013_en_1