I think I'll leave the writeup to Mike O'Shea, who had this to say about Cardiff Market (from the BBC website) :
"Always head for Ashton's and eat at least 1 portion on cockles on the spot and if the wife's not looking get some whelks as well. Then head off down the market and get a good porkpie - follow up with a couple of pints of Brains Dark. Later on upstairs for faggots and peas with a strong mug of tea and no chips! Shopping is hard work I can tell you. Mind you looking at some of the young people they eat twice that every day - on the side and with chips."
See this location in....
(Google Earth must be installed)