The advertising watchdog has warned a carmaker to ensure its terms and conditions are clearly audible in its radio adverts after a recent promotion fell foul of its standards.

A radio advert for Peugeot's Just Add Fuel promotion was the subject of a complaint to the Advertising Standards Authority when a listener found the conditions given at the end were not stated clearly.

The ASA investigated and upheld the complaint, banning Peugeot from repeating the advert in the same form.

It said: "The ASA considered that the terms and conditions included material information and qualifications relating to the “Just Add Fuel” package and therefore needed to be presented to listeners in a clear and intelligible manner.

"We noted that the terms and conditions were presented more quickly than the information in the rest of the ad and considered that they were delivered too quickly, such that certain terms were difficult to hear.

"For example, we noted that important information relating to the initial rental and final rental costs was difficult to make out.

"We therefore concluded that the ad was misleading because the terms and conditions were not stated clearly."