In a word ? YES you will need permission (permit) to trade from either the Highways agency, Council or whoever owns that particular piece of land, otherwise you run the risk of being asked to leave.
The best thing to do is to find out who owns the land and start you enquires from there.
Enjoy this page? Please pay it forward. Here's how...
Would you prefer to share this page with others by linking to it?
Click on the HTML link code below.
Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment,
your Facebook account, or anywhere that someone would find this page valuable.