If you are trading on private land you may not need a consent. To confirm the situation you are advised to contact the Licensing Office, using the details above. The landowner may need planning permission and you are advised to contact the Council's Planning Office.
If there was a way round it, wouldn't every trader do it?
Pretty sure you can't just operate a retail business anywhere without proper council approval.
Don't know exactly how markets work, but I'm guessing they have already done that for the area.
No, the OP is the only forward thinking person ever.
Not really related, but next to Charltons football ground is a row of terraced houses with small front yards. A couple of people have bought burger grills and set them up out the front on matchdays. They don't need councils permission and their burgers are nicer and half the price of the grounds ripoff ones.