Such is the power of Jamie Oliver that his parents have now been recruited to advertise food.

Kallo Foods has enlisted Trevor and Sally Oliver as the faces of its recently revamped range of organic stock cubes.

The couple will appear in the brand's 'Good Cooks Come From Great Stock' press and digital ads from next month. "The Olivers are real cooks with a passion for organic produce and good home cooking, making them a natural fit for our brand," said Alexis Garrett, Kallo Foods brand manager.