Dame Deirdre Hutton, the new chairwoman of the Food Standards Agency, has vowed to shake up the ready meal and convenience food sector.

Convenience food, she said, does not have to be unhealthy. She said she wanted to cut the amount of fat and sugar down to sensible levels in diets.

She said she intended to press ahead with reducing salt content in many foods and banning junk food advertising on children’s TV.

She added she wanted foods to be excluded from thise advert slots on the basis of the content of 100g amounts, not portion sizes.

Speaking in an interview with The Times, Hutton said the battle against the UK’s obesity crisis would take 30 years to win.