A crack down on food and drink manufacturers' advertising to children has begun, with the launch of a new inquiry by the Committee on Advertising Practice.

The body will look at the use of internet, text messaging and videos aimed at influencing children to buy products.

It will also examine the links brands build with popular children's films such as The Incredibles and Star Wars Episode II.

The move coincides with the unveiling of Ofcom's report on food and drink advertising on children's TV and the link with childhood obesity.