KFC gets through 700 million chickens a year worldwide

The Advertising Standards Authority (ASA) upheld five complaints that the chicken fillet was larger in the TV commercial than in real-life.

It found the advertised bun was thicker than those it bought in a London outlet and that there was "more filling and the lettuce was a different type".

KFC said the advert burgers were within the "standard range of dimensions".

It suggested the women in the advert may have had small hands - thus making the burger appear bigger - and that the name of the burger indicated it was smaller than other burgers.

Size and presentation

In the advert in question, a group of people are eating KFC's Mini Fillet chicken burgers at a railway station.

"Advertisers are permitted to present their products in a favourable light but not in a way likely to mislead viewers," said the ASA.

"Even though the product was called a mini chicken fillet burger, we do not think this was sufficient to alert consumers to the fact the product was smaller than appeared in the advertisement."