Most markets require a minimum 20mil public liability cover. Some markets will offer you protection under there insurer for a small fee others will require you have your own.
It’s up to the indivudiual Patch to check with the market manager what is required for every market or event they trade. If you looking for how much cover costs – below is a couple of links you can research.
With regards to product insurance – that owness is with us. Please refer any inspectors requesting this to Jeanie.