The move will surprise many, as the chef's television show investigating pig welfare standards urged people to buy British rather than cheaper pork produced abroad under poorer conditions.
But Peta argued: "The answer to saving pigs is not to buy British pork, it's to go vegetarian."
Mr Oliver's spokesman said the chef was a "big supporter" of animal welfare, while his London restaurant Fifteen served pork products from "the happiest pigs you can get".
"They do seem to be protesting against somebody who is trying to help the situation," he said.
"It's a slightly odd place for them to be protesting but nonetheless they are welcome to do that. My main concern was that they would get cold." - Telegraph.co.uk
PETA is a threat to individual freedom.