A man has been refused entry to Tesco as he tried to shop barefoot in its stores.
Video artist Dave Richards, 47, who has gone without shoes for seven years, was turned away by several branches of the supermarket chain.
Last week it emerged that customers at a Tesco store in Cardiff were banned from shopping barefoot or in their pyjamas.
The dress code was introduced at the St Mellons store because some customers had been visiting in their nightwear, prompting complaints from others.
Mr Richards, from Castle Donington, Derby, said he had written to Tesco chief executive Sir Terry Leahy to ask him why he could not shop barefoot.
The supermarket's customer services department told him it might offend people, he said.
"No other supermarket has ever kicked me out for going barefoot," he said. "But about half a dozen Tesco stores up and down the country have objected to it."
Tesco said it had no national policy on footwear in its stores.
"Most of our customers would expect to see other customers wearing some kind of footwear," a spokesman said.
"However if for a medical reason he can't wear shoes or any other footwear, we would be more than happy to sit down and discuss the issue."