What are the laws regarding the sale of lock knives at a car boot sale?

Over the years i have collected a small number of lock knives. i now wish to sell them and i was going to take them to a car boot sale but i dont know if this is legal or not. all the knives have blades of 3 inches or shorter and i have looked on various websites including trading standards but i cant find anything to say that i cant sell them at a boot sale but i really want to be sure before i go ahead. can anybody help? i am in the uk (england) so i am only interested in the uk laws regarding this. thanks in advance for any help.
Answer
The laws pertaining to the sale of your lock knives will be in effect and governed by the township in which the boot sale is taking place. with that information you can contact the authorities at that specific location.