I think that there are age restrictions involved, like when selling alcohol, but I haven't done this before so I don't want to start by selling something illegally!
Thanks - the shop isn't due to open until the middle of September - so no hurry. I just wanted to ask now to give time to organise things if necessary!
Thank you Jo - we will have a 'prove you're over 18 to purchase knives' notice and keep them behind the counter. I will check with trading standards before we open.