He did - He was taking the tools home, having used them specifically and only for their intended purpose.
Gardener cautioned for carrying traditional style gardening implements.
Why does it matter who sees them, so long as you're not behaving like a **** with them? Would you be cowering in fear if you saw within my hoary grasp a Stanley No 5 bladed article?
I'm also not aware of any law that requires you to conceal your (potentially offensive) bladed article. That's just advice from a few retail and hobby websites.
Explaining the legalities of carrying a knife for use in the field, including explanation of the law around lock-knives.
basc.org.uk