Chairman of the Local Government Association's children and young people board, David Simmonds, said the current Government strategy on healthy school meals has resulted in a "two-tier system".
Mr Simmonds said:
As champions for parents and children, councils with new public health responsibilities will want to hold all schools to account if they are ducking their moral duty to give students the best chance of living a happy and healthy life.
We now need Government to do its part by introducing an acceptable food standard that will allow councils to hold all schools to account for the nutritional quality of food they serve their pupils.
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