Traces of faecal bacteria have been found in drinks at three of the world's biggest fast food chains in the United Kingdom.
An investigation has found that McDonald's, Burger King and KFC all served ice in drinks contaminated by faecal matter. Investigators from the BBC consumer show, "Watchdog", tested ten samples at each of the chains and tested for traces of "faecal coliform" which carry a number of diseases.

Coliforms were found in three samples of McDonald's drinks, six of Burger King's and in seven samples taken at KFC sites. Four of the samples taken at Burger King and five at KFC were described as having "significant" levels.

In a response, reported widely by media, a KFC spokesman said: "We are shocked and extremely disappointed by these results."

"We have strict procedures for the management and handling of ice, including daily and weekly inspections and cleaning of the ice machine and storage holds, as well as the routine testing of ice quality across our business."

Burger King's response has also been widely circulated by media outlets: "Cleanliness and hygiene are a top priority for the Burger King brand."

"The strict procedures we have in place are designed to ensure all Guests have a positive experience each time they visit our restaurants," the Burger chain added.

Neither KFC or Burger King were immediately available for a response when contacted by CNBC.