Donald Trump has come to Britain, and in honour of his state visit, Channel 4 devoted half an hour to something equally toxic that may soon follow in his wake: an invading army of chlorinated chickens.

In Dispatches: The Truth About Chlorinated Chicken, the presenter Kate Quilton travelled to the United States to investigate American poultry production. It was the kind of programme best viewed after eating. You wouldn’t be terribly hungry when it finished.

Chlorinated chicken is an emotive subject, and a slightly misleading one: as disgusting as it sounds, the chlorine itself is not the problem. American chicken doesn’t taste like a swimming pool. Most of it tastes a bit like chicken