Any proposals to ban junk food television advertising to children must cover children up to the age of 15, the Food Standards Agency has said.

At its board meeting yesterday, the FSA said that it was “disappointed” in all of Ofcom's proposals, including a partial junk food ad ban and focusing on protecting children up to the age of nine.

Deirdre Hutton, chair of the FSA, said: “With a quarter of all 11 to 15 year olds now facing obesity, we have to be sure that any restrictions on advertising are aimed at children of all ages to have a real effect in helping to reverse this trend.”

Meanwhile, reports suggest that the government is preparing to extend junk food advertising controls to websites, text messages, computer games, cinemas and posters, and could enlist the help of supermarkets in encouraging people to buy healthy food.