Most markets will insist on you having public liability insurance to cover you in case of any accidents/injuries to the public whilst you are trading.  You will normally need to get cover for upto £5million pounds which will cost between £50 and £80 per year.  The good news is that this can generally be used at any market you attend but please check with your insurer first !

These are 2 of the best value ones we have found (please mention you saw these on findamarket.net):-