Mr Brown's support for the campaign will seek to leave behind the debris of a General Election that never was and a weekend opinion poll which put David Cameron's Conservatives seven points ahead of Labour. He is joining Families Secretary Ed Balls in announcing action ahead of a report warning of massive obesity levels in future years.
The Foresight research, commissioned in 2005 to help ministers understand the scale of the problem, indicates half the population will be obese within 25 years if current trends continue. (Sky News)