Getting back to the street traders in Llandudno, I can speak from a position of having plenty of knowledge on this subject. I have known market type traders who would have given their right arm to trade on Mostyn Street, and I can tell you, you have NO CHANCE. The only way a trader MIGHT squeeze in would be on a forecourt privately owned---but then he would have to pay a very fat rent to the landowner, so much that it would'nt be worth his while. There are many local by laws which would stop any street trader, and, obstruction of any sort on a public pavement is definately no-go. The present traders that have been mentioned will only last a day or two before they are seen off.
Why do I claim to have plenty of knowledge? Well for many years I operated a shop on Towyn crossroads the definate centre in North Wales of forecourt trading, legal, semi legal and downright illegal. Not so much now, lockup tiny shops were built to try and stop the hundreds of traders there in the 70s/80s. I myself sold everything on my forecourt outside my shop--I also let off the rights to certain patches of ground for other traders. So I have had experience as the big bad landlord. I have also had the experience of being instantly arrested by a plain clothes cop in Liverpool for selling. wait for it, balloons. No stall, nothing but a pocket full of balloons and a large inflated balloon over my shoulder. Marched off to the Cheapside (thats a nick in the Pool), searched, cautioned not quite thrown into a cell but not far off, and an appearance in Court about five or six days later. I remember it was three days before Xmas, I thought I might get a bit of seasonal mercy. Fined £60 (in 1977, a lot of cash at that time) and a warning that I wasent to go back on the street to try and make cash for the fine. Mike P.S. In case you are wondering the balloon was a con, I will admit to it. The one over my shoulder was specially made and had wrinckles on the side and was around six foot long. The ones I was selling were, of course, uninflated and had wrinckles on. But you couldnt blow them up!! But, they were only 20 pence and I was short of cash at the time.